Victory disease denotes when in military history, because of complacency or arrogance brought on by a victory or series of victories, an engagement ends disastrously for a commander and his forces.
A commander may disdain the enemy, and believe his own invincibility, leading his troops to disaster. That commander may employ strategies which, if effective in earlier combats or maneuvers, prove catastrophic against a new or smarter enemy; the commander afflicted by "victory disease" may also fail to anticipate a new enemy may use tactics different from those of old enemies. An overconfident commander may disregard military intelligence which would enable the commander to realize that new tactics are needed.
Though "victory disease" does not inevitably foretell defeat, it often precedes it. The term is also applied outside the military world.
The origin of the term ((戦勝病 senshoubyou) in Japanese)[unreliable source?] is associated with the Japanese advance in the Pacific Theater of World War II, where, after attacking Pearl Harbor in 1941, Japan won a series of nearly uninterrupted victories against the Allies in Southeast Asia and the Pacific.
Although the Japanese had planned to establish a perimeter and go on the defensive, victories encouraged them to continue expanding to where it strained logistics and the navy. This culminated in the Battle of Midway in 1942, a catastrophic defeat of the Japanese navy: all four Japanese aircraft carriers involved were sunk, and the hitherto unstoppable Japanese advance was blunted.
- The hubris of Xerxes I led to a catastrophic defeat of the Persian Empire in the Battle of Salamis, which occurred in 480 BC. This was the turning point of the Greco-Persian Wars and the ancient Greeks, whom the Persians were opposing, eventually won. The ancient Greek playwright Aeschylus fought in the battle; he wrote the play The Persians in which the Battle of Salamis is a setting.
- In 1415, the Battle of Agincourt, the English were outnumbered by 4 to 3, but the arrogance and disorganization of French knights, as well as superb quality longbows, were the underlying circumstances which led to the English overcoming the odds and annihilating the French.
- The overconfidence and lack of preparation led to the disastrous defeat of the English, led by Edward II at the Battle of Bannockburn to the Scots, led by Robert the Bruce.
- The Spanish naval assault on England in 1588 suffered the defeat of the "unsinkable" Spanish Armada. Similarly, English overconfidence led to the disaster of the English Armada and British overconfidence led to that of the Battle of Cartagena de Indias.
- The calamitous decision by Napoleon to invade Russia in 1812 led to the return of only 10,000 French soldiers when 610,000 had initially been sent out. Napoleon's repeated victories in Central Europe led him to believe that Russia would surrender after a few won battles, and made no plans for a sustained campaign or occupation in Russia.
- The first six weeks of the Franco-Prussian War saw French armies, convinced of their superiority following French victories in the Crimean War and the wars of Italian unification, enter a war with Prussia convinced that their weapons and tactics would easily defeat the Prussians. However, the Prussians had better weapons and tactics, and French arrogance and complacency led to catastrophic French defeats at Sedan and Metz.
- United States victories against Mexico and American Indians led Union forces to be overconfident going into the Civil War. Failing to update their tactics to match new technology (see also Rifling and Minie ball), they assumed that superior numbers would give them rapid victories, and ignored plans for an extended war until after repeated defeats. The Confederates similarly stereotyped the Union, at times leading to disaster.
- Confederate decisions made at and before their loss at the Battle of Gettysburg, after their outnumbered-five-to-two victory at the Battle of Chancellorsville during the Civil War.
- Captain and Brevet Lt. Col. William J. Fetterman boasted during America's Indian Wars that, given "80 men," he would "ride through the Sioux nation". He had contempt for the Sioux's fighting ability and overconfidence in his own military prowess. In 1866, during Red Cloud's War, he and his army of exactly 80 men (including two volunteering civilians) were massacred to the last man by the Sioux. It was possibly the worst army defeat on the Great Plains until eclipsed by the disaster at Little Bighorn ten years later.
- The 1876 Battle of the Little Bighorn, in which the Sioux nearly annihilated the entire 7th Cavalry of Lt. Col. George Armstrong Custer. Expecting a repeat of the Battle of Washita River, Custer ignored contrary intelligence or did not seek it out.
- In the 1879 Battle of Isandlwana during the Anglo-Zulu War, a Zulu army wiped out a British army equipped with the most advanced weapons and tactics of the age. This victory at Isandlwana led Zulus to believe they would easily wipe out the British defenders in the Battle of Rorke's Drift 1879 with ferocity and sheer numbers. Instead, the British won the battle and killed approximately 370 Zulu men.
- The Battle of Pingxingguan during the Second Sino-Japanese War between Japan and China. After a series of easy victories against their opponents, the overconfident Japanese failed to take elementary precautions.
- The battle of Cer and Kolubara during First World War where considered disastrous defeats for Austro-Hungarian Monarchy, whose overconfidence and underestimation of Serbian Army eventually lead to two year delay on Serbian Campaign.
- The catastrophic decision by Hitler to invade the Soviet Union in 1941 underestimated Soviet military resilience and counted on the success of the tactics used in previous campaigns, such as the Invasion of Poland and the Battle of France. Confident of victory, the Germans did not count on getting caught in a Russian winter or rasputitsa (mud season). As a result, the German offensive in the Soviet Union literally froze, on December 5, 1941.
- Hitler's 1941 declaration of war against the United States has perplexed historians, since Hitler was not obliged to declare war, either by treaty or circumstance. (The U.S. had not declared war, nor had it made any overt attack on Germany.) Overconfidence has been proposed as an explanation, since the war's turning point against Germany, the Battle of Stalingrad, was still a year away, and forcing the U.S. into a two-front war may have proved too powerful a temptation for Hitler to resist. As it turned out, Nazi Germany found itself to be the priority enemy to defeat first in the war, although the US still had sufficient resources to fight Japan.
- Japan's decision to attack Pearl Harbor on December 7, 1941. This followed wins in the First Sino-Japanese War the Russo-Japanese War, the First World War and early victories during the Second Sino-Japanese War
- The initial defeats suffered by the United States in the Korean War, when units reassigned from occupation duty proved incapable of resisting the North Korean advance, may have been caused by victory disease.
- Gamal Abdel Nasser believed that during the Suez Crisis, the Egyptian Armed forces had defeated the combined forces of Israel, United Kingdom and France, while in reality it was the pressure from United States which was the decisive factor. This gave Nasser an inflated view of the strength of his forces, so when the Six Day War started, he believed that Egypt would be able to defend itself against Israel's advance. However this overconfidence and false 'victory' reports which dragged Jordan and Syria in the war proved to be its downfall as Israel manage to defeat the Arab forces and conquered their territory as well.
- The crisis suffered by Israel during the Yom Kippur War. Israeli victories in the Six Day War had made them overconfident, and units on Israel's borders were unprepared for Arab attacks, although Israel narrowly avoided defeat, and ended up militarily victorious, with units deep within enemy territory.
- Israel's decision to launch the 2006 Lebanon War, responding to rocket fire by Hezbollah. The IDF used same tactics when dealing with rocket fire from Palestinian militant groups in the Gaza Strip, and underestimated the strength and determination of Hezbollah. What was expected to be quick military victory for Israel concluded with stalemate.
- U.S. Military website featured article on 'Victory disease'.
- http://groups.google.com/group/soc.history.war.world-war-ii/browse_thread/thread/109cee3784b63713[unreliable source?]
- Kennedy, David M. (March 1999). "Victory at Sea". http://www.theatlantic.com/magazine/archive/1999/03/victory-at-sea/6272/. Retrieved 29 April 2012.
- Bergerud, Eric M. (2001-04-13). Fire In The Sky: The Air War In The South Pacific (reprint, illustrated ed.). Westview Press. p. 18. ISBN 9780813338699. http://books.google.com/books?id=GZCNhrm9eOYC&pg=PA17&lpg=PA17&dq=%22Victory+Disease%22&source=web&ots=MdG3-CFSbe&sig=yhamaYsO7WwY9toggaJ66nL1-ng&hl=en&sa=X&oi=book_result&resnum=6&ct=result#PPA18,M1.
- U.S. Army Professional Writing Collection on victory disease
- Long article from the US military with much on Little Bighorn & Task Force Ranger
- On Napoleon's disaster
- Origin of the term
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