From its formation in 1775, the United States Army has been the primary land based portion of the United States military. The Army's primary responsibility has been the fighting of land battles and military occupation. The Corps of Engineers has a major role in controlling rivers. It was founded in response to a need for professional soldiery in the American Revolutionary War in order to fight the invading British Army. The Army was quite small in peacetime down to the 1940s. The Air Force became practically independent in World War II, and completely so in 1947. The Army was under the control of the War Department until 1947, and the Defense Department since then. The U.S. Army fought the War of 1812 (1812–15), American Civil War (1861–65), Spanish-American War (1898), World War I (1917–18), World War II (1941–45), Korean War (1950–53) and Vietnam War (1965–71). After the Cold War ended in 1991, the Army has focused on insurgencies in the Middle East, such as the Gulf War, and the recent War in Iraq and the War in Afghanistan.
- 1 Continental Army
- 2 19th century
- 3 Twentieth century
- 4 21st century
- 5 See also
- 6 Notes
- 7 References
- 8 Further reading
- 9 External links
The Continental Army consisted of troops from all 13 colonies. When the American Revolutionary War began at the Battles of Lexington and Concord in April 1775, the colonial revolutionaries did not have an army. Previously, each colony had relied upon the militia, made up of part-time citizen-soldiers, for local defense, or the raising of temporary "provincial regiments" during specific crises such as the French and Indian War. As tensions with Great Britain increased in the years leading up to the war, colonists began to reform their militia in preparation for the potential conflict. Training of militiamen increased after the passage of the Intolerable Acts in 1774. Colonists such as Richard Henry Lee proposed creating a national militia force, but the First Continental Congress rejected the idea.
On April 23, 1775, the Massachusetts Provincial Congress authorized the raising of a colonial army consisting of 26 company regiments, followed shortly by similar but smaller forces raised by New Hampshire, Rhode Island, and Connecticut. On June 14, 1775, the Second Continental Congress decided to proceed with the establishment of a Continental Army for purposes of common defense, adopting the forces already in place outside Boston (22,000 troops) and New York (5,000). It also raised the first ten companies of Continental troops on a one-year enlistment, riflemen from Pennsylvania, Maryland, Delaware and Virginia to be used as light infantry, who later became the 1st Continental Regiment in 1776. On June 15, the Congress elected George Washington as Commander-in-Chief by unanimous vote.
Washington succeeded in forcing the British out of Boston in 1776, but was defeated and almost captured later that year when he lost New York City. After crossing the Delaware River in the dead of winter, he defeated the British in two battles, retook New Jersey and restored momentum to the Patriot cause. Because of his strategy, Revolutionary forces captured two major British armies at Saratoga in 1777 and Yorktown in 1781. Historians laud Washington for his selection and supervision of his generals, encouragement of morale and ability to hold together the army, coordination with the state governors and state militia units, relations with Congress and attention to supplies, logistics, and training. In battle, however, Washington was repeatedly outmaneuvered by British generals with larger armies. After victory had been achieved in 1783, Washington resigned rather than seize power, proving his opposition to military dictatorship and his commitment to American republicanism.
After the authorization of the creation of a Continental Army, Congress, on 16 June 1775, created multiple departments to help support the operations of the Army. These four departments would later be renamed as Corps: the Adjutant General's Corps, the Army Corps of Engineers, the Finance Corps and the Quartermasters Corps. Congress later authorized both the creation of Field Artillery and Cavalry units in November 1775 and December 1776 respectively.
Broadly speaking, Continental forces consisted of several successive armies, or establishments:
- The Continental Army of 1775, comprising the initial New England Army, organized by Washington into three divisions, six brigades, and 38 regiments. Major General Philip Schuyler's ten regiments in New York were sent to invade Canada.
- The Continental Army of 1776, reorganized after the initial enlistment period of the soldiers in the 1775 army had expired. Washington had submitted recommendations to the Continental Congress almost immediately after he had accepted the position of Commander-in-Chief, but these took time to consider and implement. Despite attempts to broaden the recruiting base beyond New England, the 1776 army remained skewed toward the Northeast both in terms of its composition and geographical focus. This army consisted of 36 regiments, most standardized to a single battalion of 768 men strong formed into eight companies, with a rank and file strength of 640.
- The Continental Army of 1777–80 was a result of several critical reforms and political decisions that came about when it was apparent that the British were sending massive forces to put an end to the American Revolution. The Continental Congress passed the "Eighty-eight Battalion Resolve", ordering each state to contribute one-battalion regiments in proportion to their population, and Washington was subsequently given authority to raise an additional 16 battalions. Also, enlistment terms were extended to three years or "the length of the war" to avoid the year-end crises that depleted forces (including the notable near collapse of the army at the end of 1776 which could have ended the war in a Continental, or American, loss by forfeit).
- The Continental Army of 1781–82 saw the greatest crisis on the American side in the war. Congress was bankrupt, making it very difficult to replenish the soldiers whose three-year terms had expired. Popular support for the war was at its all-time low, and Washington had to put down mutinies both in the Pennsylvania Line and New Jersey Line. Congress voted to cut funding for the Army, but Washington managed nevertheless to secure important strategic victories.
- The Continental Army of 1783–84, was succeeded by the United States Army, which persists to this day. As peace was closed with the British, most of the regiments were disbanded in an orderly fashion, though several had already been diminished.
In addition to the Continental Army regulars, local militia units, raised and funded by individual colonies/states, participated in battles throughout the war. Sometimes, the militia units operated independently of the Continental Army, but often local militias were called out to support and augment the Continental Army regulars during campaigns. (The militia troops developed a reputation for being prone to premature retreats, a fact that was integrated into the strategy at the Battle of Cowpens.)
Early national period
After the war the Continental Army was quickly disbanded as part of the American distrust of standing armies, and irregular state militias became the new nation's sole ground army, with the exception of a regiment to guard the Western Frontier and one battery of artillery guarding West Point's arsenal. However, because of continuing conflict with Native Americans, it was soon realized that it was necessary to field a trained standing army. The first of these, the Legion of the United States, was established in 1791.
War of 1812
The War of 1812, the second and last American war against the British, was less successful than the Revolution had been. An invasion of Canada failed, and U.S. troops were unable to stop the British from burning the new capital of Washington, D.C.. However, the Regular Army, under Generals Winfield Scott and Jacob Brown, proved they were professional and capable of defeating a major invasion by the regular British army in the Niagara campaign of 1814. The nation celebrated the Army's great victory under Andrew Jackson, at the Battle of New Orleans in January 1815, thus ending the war on a high note.
The multiple failures and fiascos of the War of 1812 convinced Washington that thorough reform of the War Department was necessary. Secretary of War, John C. Calhoun reorganized the department into a system of bureaus, whose chiefs held office for life, and a commanding general in the field, although the Congress did not authorize this position. Winfield Scott became the senior general until the start of the American Civil War in 1861. The bureau chiefs acted as advisers to the Secretary of War while commanding their own troops and field installations. The bureaus frequently conflicted among themselves, but in disputes with the commanding general, the Secretary of War generally supported the bureaus. Congress regulated the affairs of the bureaus in detail, and their chiefs looked to that body for support.
Calhoun set up the Bureau of Indian Affairs in 1824, the main agency within the War Department for dealing with Native Americans until 1849, when the Congress transferred it to the newly founded Department of the Interior.
Between 1815 and 1860, the main role of the Army was control of Indians in the West, and manning coast artillery stations at major ports. Most of the forces were stationed on the frontier, or and coastal defense units near seaports.
Transportation was a key issue and the Army (especially the Army Corps of Engineers) was given full responsibility for facilitating navigation on the rivers. The steamboat, first used on the Ohio River in 1811, made possible inexpensive travel using the river systems, especially the Mississippi and Missouri rivers and their tributaries. Army expeditions up the Missouri River in 1818–25 allowed engineers to improve the technology. For example, the Army's steamboat "Western Engineer" of 1819 combined a very shallow draft with one of the earliest stern wheels. In 1819–25 Colonel Henry Atkinson developed keelboats with hand-powered paddle wheels.
War with Mexico
The U.S. used regular units and many volunteer units to fight Mexico, 1846–48. The American strategy was threefold: to take control of the Southwest (New Mexico and California); to invade Mexico from the North under general Zachary Taylor. Finally to land troops and capture Mexico City with an army under General Winfield Scott. All the operations were successful; the Americans won all the major battles.
The army expanded from 6,000 regulars to more than 115,000. Of these, approximately 1.5% were killed in the fighting and nearly 10% died of disease; another 12% were wounded or discharged because of disease.
Internally the main military action involved the years of warfare with the Seminole Indians in Florida. They refused to move west and effectively used the terrain as a defense. The First Seminole War was from 1814 to 1819, the Second Seminole War from 1835 to 1842, and the Third Seminole War from 1855 to 1858.
At the outset of the American Civil War the regular U.S. army was small and generally assigned to defend the nation's frontiers from attacks by Native Americans. As one after another Southern state seceded many experienced officers and men resigned or left to join the Confederacy, further limiting the regular army's abilities.
The attack on Fort Sumter by South Carolina militia marked the beginning of hostilities. Both sides recruited large numbers of men into a new Volunteer Army, recruited and formed by the states. Regiments were recruited locally, with company officers elected by the men. Although many officers in the regular army accepted commissions in the new volunteer units outsiders were not usually welcome as officers, unless they were surgeons whose value was obvious. Colonels – often local politicians who helped raise the troops – were appointed by the governors, and generals were appointed by President Abraham Lincoln.
The Volunteer Army was so much larger than the Regular Army that entirely new units above the regimental level had to be formed. The grand plan involved geographical theaters, with armies (named after rivers such as the Army of the Potomac in the Eastern Theater) comprising brigades, divisions and corps headquarters.
The rapidly growing armies were relatively poorly trained when the first major battle of the war occurred at Bull Run in the middle of 1861. The embarrassing Union defeat and subsequent inability of the Confederacy to capitalize on their victory resulted in both sides spending more time organizing and training their green armies. Much of the subsequent actions taken in 1861 were skirmishes between pro-Union and pro-Confederacy irregular forces in border states like Missouri and Kentucky.
In 1862 the war became much more bloody, though neither side was able to gain a lasting strategic advantage over the other. However, the decisive battles of Gettysburg in the east and Vicksburg in the west allowed the momentum of the war to shift in favor of the Union in 1863. Increasingly, Confederate forces were outmatched by the more numerous and better equipped Union forces, whose greater population and economic resources became critical factors as the war became one of attrition. An increasingly effective naval blockade further damaged the Southern war economy.
By 1864, long-term Union advantages in geography, manpower, industry, finance, political organization and transportation were overwhelming the Confederacy. Grant fought a remarkable series of bloody battles with Lee in Virginia in the summer of 1864. Lee's defensive tactics resulted in higher casualties for Grant's army, but Lee lost strategically overall as he could not replace his casualties and was forced to retreat into trenches around his capital, Richmond, Virginia. Meanwhile, in the West, William Tecumseh Sherman captured Atlanta in 1864. His March to the Sea destroyed a hundred-mile-wide swath of Georgia, with little Confederate resistance. In 1865, the Confederacy collapsed after Lee surrendered to Grant at Appomatox Courthouse.
In all, 2.2 million men served in the Union army; 360,000 of whom died from all causes – two-thirds from disease. The Volunteer Army was demobilized in summer 1865.
Lincoln's Emancipation Proclamation of January 1, 1863, enabled both free blacks and escaped slaves, to join the Union Army. About 190,000 volunteered, further enhancing the numerical advantage the Union armies enjoyed over the Confederates, who did not dare emulate the equivalent manpower source for fear of fundamentally undermining the legitimacy of slavery. Black Union soldiers were mostly used in garrison duty, but they fought in several battles, such as the Battle of the Crater (1864), and the Battle of Nashville (1865).
There was bad blood between Confederates and black soldiers, with no quarter given on either side. At Ft. Pillow on April 12, 1864 Confederate units under Maj. Gen. Nathan Bedford Forrest went wild and massacred black soldiers attempting to surrender, which further inflamed passions.
Indian wars of the late 19th century
Following the Civil War, the U.S. Army fought a long battle with Native Americans, who resisted U.S. expansion into the center of the continent. By the 1890s the U.S. saw itself as a potential international player. The Army played a central role in winning the Spanish-American War of 1898 and the less well known Philippine-American War of 1899–1901.
As settlement sped up across the West after the transcontinental railroad was completed in 1869, clashes with Native Americans of the Plains and southwest reached a final phase. The military's mission was to clear the land of free-roaming Indians and put them onto reservations. The stiff resistance of battle-hardened, well-armed mounted Indian warriors resulted in the Indian Wars.
In the Apache and Navajo Wars, Colonel Christopher "Kit" Carson forced the Mescalero Apache onto a reservation in 1862. Skirmishes between Americans and Apaches continued until after the turn of the century. In 1863–1864, Carson used a scorched earth policy in the Navajo campaign, burning Navajo fields and homes, and capturing or killing their livestock. He was aided by other Indian tribes with long-standing enmity toward the Navajos, chiefly the Utes. Later in 1864, he fought a combined force of more than one thousand Kiowa, Comanche, and Plains Apache at the First Battle of Adobe Walls. Carson retreated but he managed to destroy an Indian village and winter supplies. In the Red River War which followed the U.S. army systematically destroyed Comanche property, horses, and livelihood in the Texas panhandle, resulting in the surrender of the last Comanche war chief, Quanah Parker, in June 1875.
In June 1877, in the Nez Perce War the Nez Perce under Chief Joseph, unwilling to give up their traditional lands and move to a reservation, undertook a 1,200 mile fighting retreat from Oregon to near the Canadian border in Montana. Numbering only 200 warriors, the Nez Perce battled some 2,000 American regulars and volunteers in a total of eighteen engagements, including four major battles and at least four fiercely contested skirmishes." The Nez Perce were finally surrounded at the Battle of Bear Paw and surrendered.
The Great Sioux War of 1876–77 was conducted by the Lakota under Sitting Bull and Crazy Horse. The conflict began after repeated violations of the Treaty of Fort Laramie (1868) once gold was discovered in the hills. By far the most famous battle was the one-sided Indian victory at the Battle of the Little Bighorn, in which combined Sioux and Cheyenne forces defeated the 7th Cavalry, led by General George Armstrong Custer. The West was largely pacified by 1890, apart from small Indian raids along the Mexican border.
Combat in the Indian wars resulted in the deaths of about 4,340 people, including soldiers, civilians and native Americans. In all the Indian wars combined from 1790 to 1910, regular cavalry units fought in about 1000 engagements and suffered more than 2000 total killed and wounded. Disease and accidents caused far more Army casualties than combat; annually, eight soldiers per 1000 died from disease, and five per 1000 died from battle wounds or accidents.
In 1910, the U.S. Signal Corps acquired and flew the Army's first aircraft, the Wright Type A biplane.
The Maneuver Division was formed in San Antonio, Texas, in March 1911, to undertake offensive operations against Mexico during the Mexican Revolution. This was the United States' first attempt at modernizing the division concept. Major General Leonard Wood, then Army Chief of Staff, mobilized the division primarily to demonstrate to Congress that the United States was not adequately prepared for modern warfare. The division was disbanded on 7 August 1911.
Because of the mobilization difficulties experienced with the Maneuver Division, on 15 February 1913 a standing organization of a "regular army organized in divisions and cavalry brigades ready for immediate use as an expeditionary force or for other purposes..." and "an army of national citizen soldiers organized in peace in complete divisions and prepared to reenforce the Regular Army in time of war" was organized by Secretary of War Henry L. Stimson and known as the "Stimson Plan." The continental United States was divided into four geographic departments (Eastern, Central, Western, and Southern) and a regular army division assigned to each, and 12 geographic districts, each with a national guard infantry division assigned. 32 of the 48 state governors committed their national guards to support of the plan. There were also three artillery commands: the Northern Atlantic Coast Artillery District, the Southern Atlantic Coast Artillery District, and the Pacific Coast Artillery Discrict.
In 1914 and 1916, U.S. troops were sent into Mexico during the Mexican Revolution. The Pancho Villa Expedition under Brigadier General John J. Pershing attempted to capture Pancho Villa, a Mexican who had mounted attacks on U.S. border towns. The skirmishes on the border later became known as the Border War (1910–1919).
World War I
A combined conscript and volunteer force, the National Army, was formed by the United States War Department in 1917 to fight in World War I. The National Army was formed from the old core of the regular United States Army, augmented by units of the United States National Guard and a large draft of able-bodied men.
The Selective Service Act established the broad outlines of the Army's structure. There were to be three increments:
- The Regular Army, to be raised immediately to the full wartime strength of 286,000 authorized in the National Defense Act of 1916;
- The National Guard, also to be expanded immediately to the authorized strength of approximately 450,000; and
- A National Army (the National Defense Act had called it a Volunteer Army), to be created in two increments of 500,000 men each at such time as the President should determine.
Much of the identity of these three segments eventually would be lost as recruits and draftees alike were absorbed in all units, so that in mid-1918 the War Department would change the designation of all land forces to one "United States Army." The original segment to which regiments, brigades, and divisions belonged nevertheless remained apparent from numerical designations. For the Regular Army, for example, divisions were numbered up to 25, while numbers 26 through 49 were reserved for the National Guard and 50 through higher numbers for divisions of the National Army.
At its greatest size the National Army had more than six million men. Promotions within the National Army were quick, with most United States Army officers receiving double and triple promotions within a space of only two years. Dwight D. Eisenhower entered the National Army as a captain and was a lieutenant colonel one year later. Douglas MacArthur also advanced quickly in the National Army, rising from major to brigadier general in two years.
The Army entered World War I with very large divisions, often numbering more than 30,000 men (the 4th Division contained 32,000, for example) and consisting of two infantry brigades of two regiments each, with a total of twelve infantry battalions per division. Each division also had three artillery regiments and an engineer regiment.
The United States joined World War I in April 1917 on the side of the Triple Entente (British Empire, France, and Russia). Due to the necessary period of training before the units were moved overseas the first elements of the American Expeditionary Forces arrived in June 1917. Their first actions of the Western Front came in October 1917. U.S. troops contributed to the offensive that finally broke through the German lines. With the armistice on 11 November 1918, the Army once again decreased its forces.
The National Army was disbanded in 1920 and all personnel not subject to demobilization who had held ranks in the National Army were reverted to Regular Army status. George S. Patton, who had been a colonel in the National Army, returned to the Regular Army as a captain. Some, such as Douglas MacArthur, maintained their wartime rank in the Regular Army. For those keeping their wartime ranks the reality was, however, that they would usually remain at that specific rank for years. This often resulted in talented officers leaving service in the interwar years.
After establishing post-World War I divisions, the Army experienced a prolonged period of stagnation and deterioration. The National Defense Act of 1920 authorized a Regular Army of 296,000 men, but Congress gradually backed away from that number. As with the Regular Army, the National Guard never recruited its authorized 486,000 men, and the Organized Reserves became merely a pool of reserve officers. The root of the Army's problem was money. Congress yearly appropriated only about half the funds that the General Staff requested. Impoverished in manpower and funds, infantry and cavalry divisions dwindled to skeletal organizations.
Between 1923 and 1939 divisions gradually declined as fighting organizations. After Regular Army divisions moved to permanent posts, the War Department modified command relationships between divisional units and the corps areas, making division and brigade commanders responsible only for unit training. They were limited to two visits per year to their assigned elements – and that only if corps area commanders made funds available. Later, as a further economy move, the War Department reduced the number of command visits to one per year, a restriction that effectively destroyed the possibility of training units as combined arms teams.
World War II
During World War II, the Army of the United States was formed as a successor to the National Army. The Army of the United States operated on the same principles as its predecessor, combining Regular Army, National Guard, and conscript forces into one fighting unit. The Army of the United States also incorporated Reserve forces.
The Army fought World War II with more flexible divisions consisting of three infantry regiments of three infantry battalions each. From the point of view of soldiers, most of their time was spent in training in the U.S., with large numbers going overseas in 1944.
The U.S. joined World War II after the Japanese attack on Pearl Harbor. On the European front, U.S. Army troops formed a significant portion of the forces that captured North Africa and Sicily. On D-Day and in the subsequent liberation of Europe and defeat of Nazi Germany, millions of U.S. Army troops played a central role. In the Pacific, Army soldiers participated alongside U.S. Marines in the "island hopping" campaign that wrested the Pacific Islands from Japanese control. Following the Axis surrenders in May (Germany) and August (Japan) of 1945, Army troops were deployed to Japan and Germany to occupy the two defeated nations. The Army Air Forces had been virtually independent during the war. In 1947 it separated from the Army to become the United States Air Force.
The end of World War II set the stage for the East-West confrontation known as the Cold War. With the outbreak of the Korean War, concerns over the defense of Western Europe rose. Two corps, V and VII, were reactivated under Seventh United States Army in 1950 and American strength in Europe rose from one division to four. Hundreds of thousands of U.S. troops remained stationed in West Germany, with others in Belgium, the Netherlands and the United Kingdom, until the 1990s in anticipation of a possible Soviet attack.
During the Cold War, American troops and their allies fought Communist forces in Korea and Vietnam (see Domino Theory). The Korean War began in 1950, when the Soviets walked out of a U.N. Security Council meeting, removing their possible veto. Under a United Nations umbrella, hundreds of thousands of U.S. troops fought to prevent the takeover of South Korea by North Korea, and later, to invade the northern nation. After repeated advances and retreats by both sides, and the PRC People's Volunteer Army entry into the war, the Korean Armistice Agreement ended the war and returned the peninsula to the status quo in 1953.
During the 1950s, the Pentomic reorganization shifted the basic tactical unit from the regiment to the five-company battle group. Armored divisions did not change during the Pentomic era. Instead of brigades, an armored division had three "Combat Commands" named CCA, CCB, and CCC.
On 16 December 1960, the Army Chief of Staff directed a reappraisal of division organization. Resulting studies were carried out between January and April 1961, and fully implemented by 1965. The resulting Reorganization of Army Divisions (ROAD) program shifted all types of divisions (Mechanized, Airborne, Armor, Infantry and Cavalry) to an identical structure of three brigades of three (sometimes four) battalions. The ROAD division consisted of a mix of nine to twelve armor and infantry battalions assigned to the division to meet the expected needs of the division based on its Mission, the likely Enemy, the Terrain/weather, and other forces available or Troops (METT). Each brigade would be assigned or attached the mix of battalions and companies based on the division commanders estimate based on METT. The ROAD concept was based on the armored divisions of WWII and Korea. As operations continued, the division commander could and did move battalions and companies as needed by the flow of the battle. The 1st Air Cavalry in Vietnam had nine battalions spread as needed between the three brigade headquarters, but often moved the equivalent of one battalion each day by airlift from one side of the battefield to the other. An infantry battalion in 1st Infantry Division in Vietnam could expect having the number of companies under his command change at least once a day, with companies from different divisions not uncommon. In the "Heavy" divisions in Europe, a tank or infantry company could find itself moved to other battalions more than once a week, and to another brigade as needed.
The Vietnam War is often regarded as a low point in the Army's record due to the use of drafted personnel, the unpopularity of the war with the American public, and frustrating restrictions placed on the Army by U.S. political leaders (i.e. no invasion of communist-held North Vietnam). While American forces had been stationed in the Republic of Vietnam since 1959, in intelligence and advisory/training roles, they did not deploy in large numbers until 1965, after the Gulf of Tonkin Incident. American forces effectively established and maintained control of the "traditional" battlefield, however they struggled to counter the guerrilla hit and run tactics of the communist Viet Cong and the North Vietnamese Army. On a tactical level, American soldiers (and the U.S. military as a whole) did not lose a sizable battle. For instance in the Tet Offensive in 1968, the U.S. Army turned a large scale attack by communist forces into a massive defeat of the Viet Cong on the battlefield (though at the time the offensive sapped the political will of the American public) which permanently weakened the guerrilla force. Thereafter, most large scale engagements were fought with the regular North Vietnamese Army. In 1973 domestic political opposition to the war finally forced a U.S. withdrawal. In 1975, Vietnam was unified under a communist government.
During the 1960s the Department of Defense continued to scrutinize the reserve forces and to question the number of divisions and brigades as well as the redundancy of maintaining two reserve components, the Army National Guard and the Army Reserve. In 1967 Secretary of Defense McNamara decided that 15 combat divisions in the Army National Guard were unnecessary and cut the number to 8 divisions (1 mechanized infantry, 2 armored, and 5 infantry), but increased the number of brigades from 7 to 18 (1 airborne, 1 armored, 2 mechanized infantry, and 14 infantry). The loss of the divisions did not set well with the states. Their objections included the inadequate maneuver element mix for those that remained and the end to the practice of rotating divisional commands among the states that supported them. Under the proposal, the remaining division commanders were to reside in the state of the division base. No reduction, however, in total Army National Guard strength was to take place, which convinced the governors to accept the plan. The states reorganized their forces accordingly between 1 December 1967 and 1 May 1968.
Post Vietnam War
A "Total Force Policy" was adopted by Chief of Staff of the Army General Creighton Abrams in the aftermath of the Vietnam War and involved treating the three components of the Army – the Regular Army, the Army National Guard and the Army Reserve as a single force.
Training and Doctrine Command was established as a major U.S. Army command on 1 July 1973. The new command, along with the U.S. Army Forces Command (FORSCOM), was created from the Continental Army Command (CONARC) located at Fort Monroe, VA. That action was the major innovation in the Army's post-Vietnam reorganization, in the face of realization that CONARC's obligations and span of control were too broad for efficient focus. The new organization functionally realigned the major Army commands in the continental United States. CONARC, and Headquarters, U.S. Army Combat Developments Command (CDC), situated at Fort Belvoir, VA, were discontinued, with TRADOC and FORSCOM at Fort Belvoir assuming the realigned missions. TRADOC assumed the combat developments mission from CDC, took over the individual training mission formerly the responsibility of CONARC, and assumed command from CONARC of the major Army installations in the United States housing Army training center and Army branch schools. FORSCOM assumed CONARC's operational responsibility for the command and readiness of all divisions and corps in the continental U.S. and for the installations where they were based.
The 1980s was mostly a decade of reorganization. The Army converted to an all-volunteer force with greater emphasis on training and technology. The Goldwater-Nichols Act of 1986 created Unified Combatant Commands bringing the Army together with the other four military branches under unified, geographically organized command structures. The Army also played a role in the invasions of Grenada in 1983 (Operation Urgent Fury) and Panama in 1989 (Operation Just Cause).
By 1989 Germany was nearing reunification and the Cold War was coming to a close. The Army leadership reacted by starting to plan for a reduction in strength. By November 1989 Pentagon briefers were laying out plans for 'Operation Quicksilver,' a plan to reduce Army endstrength by 23%, from 750,000 to 580,000. A number of incentives such as early retirement were used. In 1990 Iraq invaded its smaller neighbor, Kuwait, and U.S. land forces, led by the 82nd Airborne Division, quickly deployed to assure the protection of Saudi Arabia. In January 1991 Operation Desert Storm commenced, a U.S.-led coalition which deployed over 500,000 troops, the bulk of them from U.S. Army formations, to drive out Iraqi forces. The campaign ended in a victory for the Army, as Western coalition forces routed the Iraqi Army, organized along Soviet lines, in just one hundred hours.
After Desert Storm, the Army did not see major combat operations for the remainder of the 1990s. Army units did participate in a number of peacekeeping activities, such as the UN peacekeeping mission in Somalia in 1993, where the abortive Operation Gothic Serpent led to the deaths of eighteen American soldiers and the withdrawal of international forces. The Army also contributed troops to NATO peacekeeping forces in the former Yugoslavia from December 1995, initially with IFOR. U.S. Army forces only left Bosnia & Herzegovina in 2004 with the disestablishment of Task Force Eagle on November 24, 2004. U.S. Army troops remain in Kosovo with KFOR.
During the first half of the decade the Army deactivated 8 of its 18 active divisions:
- 2nd Armored Division in 1995
- 3rd Armored Division in 1992
- 5th Infantry Division (Mechanized) in 1992
- 6th Infantry Division (Light) in 1994
- 7th Infantry Division (Light) in 1994
- 8th Infantry Division (Mechanized) in 1992
- 9th Infantry Division (Motorized) in 1991
- 24th Infantry Division (Mechanized) in 1996
as well as two of its ten National Guard divisions:
During the mid-late 1990s, the Army trialled Force XXI. One of its initiatives was Task Force 21 (also called Task Force XXI), a battlefield digitized brigade formed for the Advanced Warfighting Exercises in 1997 to test Force XXI concepts, technology, and tactics. The brigade was formed from the 4th Infantry Division (which replaced the deactivated 2d Armored Division in 1992) and the 1st Cavalry Division as early as 1992, with some field testing beginning at Fort Hood in late 1992, early 1993. The 4th Infantry Division units assigned were 3-66 Armor and 1-22 Infantry, both of the 3d Brigade, while 1st Cavalry Division drew soldiers across a variety of support and combat fields.
Technologies tested included Software-defined radios, Applique computers, Ground Surveillance Radar, Satellite radio email systems, and Advanced UAV technology. TF-XXI participated in various Advanced Warfighting Exercises, including WARRIOR FOCUS (1995 #4).
After the September 11 attacks, and as part of the Global War on Terror, U.S. and NATO combined arms (i.e. Army, Navy, Air Force, Marine, Special Operations) forces invaded Afghanistan in 2001, replacing the Taliban government.
The Army took part in the combined U.S. and allied 2003 invasion of Iraq. Within months the mission changed from conflict between regular militaries to counterinsurgency, with large numbers of suicide attacks resulting in the deaths of more than 4,000 U.S. service members (as of March 2008) and injuries to thousands more.
Most of the units that carried out the ground campaign phase of the invasion of Iraq, and who bore the larger part of the conflict with the Iraqi military in 2003 were those of the Army. Since then, they have performed numerous operations against insurgents.
The Army has had to make several adjustments to address demands on its personnel and equipment. The US Army has utilized its stop-loss policy and has required more of its combat personnel to serve more tours of duty than before, due to the need for experienced personnel. There are deep concerns about effects on the psychological health of US soldiers in Iraq. Suicides among US soldiers have been rising, and have reached their highest rate in 26 years. This increase has coincided with US deployments in Afghanistan and Iraq.
During the insurgency, it was found that most army vehicles such as HMMWVs were insufficiently armored, leading to efforts to add greater armor to protect against improvised explosive devices. Some soldiers added armor by using modifications known as hillbilly armor. In the short term, HMMWVs in service in Iraq are being replaced by Category 1 MRAP vehicles, primarily the Force Protection Cougar H and the International MaxxPro. The US Marine Corps plans to replace all HMMWVs patrolling "outside the wire" with MRAP vehicles.
The lack of stability in Iraq has led to longer deployments for Regular Army as well as Reserve and Guard troops. U.S. troops withdrew in December 2011, but fighting continues. 3,293 US Army personnel were killed in the conflict.
- Military history of the United States
- Organizations which deal with US Army History
- Other topics
- Wright, Continental Army, p. 10–11
- Don Higginbotham, George Washington and the American Military Tradition (University of Georgia Press, 1985)
- "Army Birthdays". United States Army Center of Military History. 31 July 2009. http://www.history.army.mil/html/faq/branches.html. Retrieved 1 June 2010.
- Charles M. Wiltse, John C. Calhoun, Nationalist, 1782–1828 (1944) pp. 142–54
- William S. Belko, "'John C. Calhoun and the Creation of the Bureau of Indian Affairs: An Essay on Political Rivalry, Ideology, and Policymaking in the Early Republic," South Carolina Historical Magazine 2004 105(3): 170–197. ISSN 0038-3082
- Francis P. Prucha, The Great Father: The United States Government and the American Indians (Abridged Edition 1986) excerpt and text search
- Samuel J. Watson, Jackson's Sword: The Army Officer Corps on the American Frontier, 1810–1821 (University Press of Kansas; 2012)
- Adam I. Kane, The Western River Steamboat (2004)
- Roger L. Nichols, "Army Contributions to River Transportation, 1818–1825," Military Affairs (1969) 33#1 pp. 242–249 in JSTOR
- K. Jack Bauer, Zachary Taylor: Soldier, Planter, Statesman of the Old Southwest (1985).
- Timothy D. Johnson, Winfield Scott: The Quest for Military Glory (1998)
- James M. McCaffrey, Army of Manifest Destiny: The American Soldier in the Mexican War, 1846–1848 (1994)
- Richard Price Winders, Mr. Polk's Army: The American Military Experience in the Mexican War (1997)
- John Missall and Mary Lou Missall, The Seminole Wars: America's Longest Indian Conflict (University Press of Florida, 2004).
- Mark H.Dunkelman, "'A just right to select our own officers': Reactions in a Union regiment to officers commissioned," Civil War History (March 1998) 44#1 pp. 24–34
- Allan Satin, "The Development of the Army Corps System in the Union Army," Ohio Civil War Genealogy Journal, (June 2010) 14#2 pp. 84–89
- John David Smith, ed. (2004). Black Soldiers in Blue: African American Troops in the Civil War Era. U of North Carolina Press. ISBN 978-0-8078-5579-9. http://books.google.com/books?id=leVNe6APgDQC.
- See excerpts from Official Reports; Andrew Ward, River Run Red: The Fort Pillow Massacre in the American Civil War (2005) excerpt and text search
- Alvin M. Jacoby, Jr., The Nez Perce and the Opening of the Northwest. (Yale U Press, 1965), p. 632
- Robert M. Utley, Frontier Regulars; the United States Army and the Indian, 1866–1891 (1973)
- Spencer C. Tucker (2011). The Encyclopedia of North American Indian Wars, 1607–1890: A Political, Social, and Military History. ABC-CLIO. p. 140. ISBN 9781851096039. http://books.google.com/books?id=lyNakUZmQ9IC&pg=PA140.
- Jason Hook; Martin Pegler (2001). To Live and Die in the West: The American Indian Wars, 1860–90. Taylor & Francis. p. 36. ISBN 9781579583705. http://books.google.com/books?id=oIdfr5fuGCAC&pg=PA36.
- Cragg, p.272.
- CMH Pub 30–21; AMERICAN MILITARY HISTORY; VOLUME 1
- Steven Thomas Barry, Battalion Commanders at War: U.S. Army Tactical Leadership in the Mediterranean Theater, 1942-1943 (University Press of Kansas; 2013) examines the tactical adaptability and crucial leadership of battalion-level commanders in North Africa and Sicily.
- Wilson, John B. (1997). Maneuver and Firepower: The Evolution of Divisions and Separate Brigades. Washington, DC: Center of Military History.
- Woodruff, Mark. Unheralded Victory: The Defeat of the Viet Cong and the North Vietnamese Army 1961–1973 (Arlington, VA: Vandamere Press, 1999).
- Wilson, John B. (1997). Maneuver and Firepower: The Evolution of Divisions and Separate Brigades. Washington, DC: Center of Military History, Chapter XII, for references see Note 48.
- Army National Guard Constitution
- Shear, Jeff, "America in the Hands of a Professional Military", Miller-McCune, 15 April 2011.
- An Army at War: Change in the Midst of Conflict, p.515, via Google Books
- http://www3.ausa.org/webpub/DeptAUSANews.nsf/byid/CCRN-6CGMTQ The [[38th Infantry Division (United States)|]] was the last formation to lead the Task Force.
- Mark D. Sherry, The Army command post and defense reshaping 1987–1997, Center for Military History, 2008, 53.
- U.S. Casualties in Iraq
- US army suicides set for new high, BBC, 1 February 2008.
-  More MRAPs: Navistar's MaxxPro Maintains the Pole Position
- Hampson, Rick, "West Point's Quiet Place Of Honor, Lost Dreams", USA Today, 28 December 2011, p. 1.
- "Case Reference Guide for Review of Military Records", Military Personnel Records Center, published 2001
- "Army Force Components Training Guide", Military Personnel Records Center, published 2003
- Wilson, John B. (1997). Maneuver and Firepower: The Evolution of Divisions and Separate Brigades. Washington, DC: Center of Military History.
- United States Army Service Records (1910–2005), National Personnel Records Center, Overland, Missouri
- Abrahamson, James L. America Arms for a New Century: The Making of a Great Military Power (1981), examines reformers and modernizers
- Anderson, Fred, ed. The Oxford Companion to American Military History (2000)
- Black, Jeremy. America as a Military Power: From the American Revolution to the Civil War (2002) online edition
- Bluhm, Jr,, Raymond K. (Editor-in-Chief); Andrade, Dale; Jacobs, Bruce; Langellier, John; Newell, Clayton R.; Seelinger, Matthew (2004). U.S. Army: A Complete History (Beaux Arts ed.). Arlington, VA: The Army Historical Foundation. pp. 744. ISBN 978-0-88363-640-4.
- Chambers, ed. John Whiteclay. The Oxford Guide to American Military History (1999) online at many libraries
- Coffman, Edward M. The Regulars: The American Army, 1898–1941 (2007) excerpt and text search
- Coffman, Edward M. The War to End All Wars: The American Military Experience in World War I (1998), a standard history
- Doughty, Robert. American Military History and the Evolution of Western Warfare, (1996), stress on combat operations
- Higginbotham, Don. The War of American Independence: Military Attitudes, Policies, and Practice, 1763–1789 (1971, 1983). an analytical history of the war online via ACLS Humanities E-Book.
- Huston, James A. The Sinews of War: Army Logistics, 1775–1953 (1966), U.S. Army; pp. 755 online
- Kretchik, Walter E. U.S. Army Doctrine: From the American Revolution to the War on Terror (University Press of Kansas; 2011) 392 pages; studies military doctrine in four distinct eras: 1779–1904, 1905–1944, 1944–1962, and 1962 to the present.
- Matloff, Maurice, ed. American Military History (1996) full text online; standard textbook used in ROTC
- Millett, Allan R., and Peter Maslowski. For the common defense: a military history of the United States of America (1984)
- Olinger, Mark A., “Organizing for War in Canada, 1812–1814: The U.S. Army Experience,” Ontario History 104 (Spring 2012), 21–44.
- Oyos, Matthew. "Courage, Careers, and Comrades: Theodore Roosevelt and the United States Army Officer Corps," Journal of the Gilded Age & Progressive Era (2011) 10#1 pp. 23–58. On TR's controversial reforms that included physical testing and rapid promotion of younger talent
- Shannon, Fred. The Organization and Administration of the Union Army 1861–1865 (2 vol 1928) vol 1 excerpt and text search; vol 2 excerpt and text search
- Sweeney, Jerry K., and Kevin B. Byrne, eds. A Handbook of American Military History: From the Revolutionary War to the Present, (1997) ISBN 0-8133-2871-3
- Weigley, Russell Frank. The American Way of War: A History of United States Military Strategy and Policy, (1977)
- Utley, Robert M. Frontier Regulars; the United States Army and the Indian, 1866–1891 (1973)
- Richard W. Stewart, ed (2004). American Military History Vol. 1: The United States Army and the Forging of a Nation, 1775-1917. Washington, D.C.: United States Army Center of Military History. ISBN 0-16-072362-0. CMH Pub 30–21. http://www.history.army.mil/books/AMH-V1/index.htm. ; Richard W. Stewart, ed (2004). American Military History Vol. 2: The United States Army in a Global Era, 1917–2003. Washington, D.C.: United States Army Center of Military History. CMH Pub 30–22. http://www.history.army.mil/books/AMH-V2/AMH%20V2/index.htm.
- Wintermute, Bobby A., “‘The Negro Should Not Be Used as a Combat Soldier’: Reconfiguring Racial Identity in the United States Army, 1890–1918,” Patterns of Prejudice, 46 (July 2012), 277–98.
- History and Heritage of the U.S. Army – from the official U.S. Army website
- Army Historical Foundation
- United States Army Center of Military History
- Centuries of Service: The U.S. Army 1775–2005 – A booklet published by the United States Army Center of Military History
- Online Bookshelf of Books and Research Resources at the United States Army Center of Military History
- The short film Big Picture: Soldiers' Heritage is available for free download at the Internet Archive [more]
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