|Part of Iran–Iraq War|
</tr><tr> <th colspan="2" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">Belligerents</th> </tr><tr> <td style="width:50%; border-right:1px dotted #aaa;"> Iraq </td><td style="width:50%; padding-left:0.25em"> Iran </td> </tr><tr> <th colspan="2" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">Commanders and leaders</th> </tr><tr> <td style="width:50%; border-right:1px dotted #aaa;"> General Sultan Hashim Ahmad al Tai General Jamal Zanoun General Hisham Sabah al-Fakhri </td><td style="width:50%; padding-left:0.25em"> Mohsen Rezaee </td> </tr><tr> <th colspan="2" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">Strength</th> </tr><tr> <td style="width:50%; border-right:1px dotted #aaa;">40,000-60,000 </td><td style="width:50%; padding-left:0.25em">100,000 </td> </tr><tr> <th colspan="2" style="background-color: #B0C4DE; text-align: center; vertical-align: middle;">Casualties and losses</th> </tr><tr> <td style="width:50%; border-right:1px dotted #aaa;">10,000-12,000 </td><td style="width:50%; padding-left:0.25em">15,000 </td></tr></table>
After its failure to capture Basra in 1982, Iran launched Operation Kheibar in 1984 to capture the Baghdad-Basra highway. This resulted in the Battle of the Marshes, and the operation failed, but Iran planned for Operation Badr in a further attempt to capture it. Without coincidence, the operation was named after the Prophet Mohammed's first military victory in Mecca centuries before.
The aim of the offensive was focused on capturing the Baghdad-Basra highway, which was a vital link between the two major cities, and for the movement of military supplies and vehicles to support and replenish the Iraqi defenders at the front-line. Another objective included the crossing of the Tigris River, which would cut off Basra from Iraq and give an equally psychological blow to the country. This operation was similar to Operation Kheibar, except it consisted of far superior planning. Iran used 100,000 troops, and 60,000 more in reserve. Iran assessed the marshy terrain and plotted points where to land tanks. Iran also would construct pontoon bridges across the marshes. The Basij forces were also equipped with anti-tank weapons.
Iran found itself reorganizing the Pasdaran and Basij units into more conventional forces as a response to several failures in the past. Although highly motivated and outnumbering the Iraqis, the Iranians were poorly trained and lacked heavy equipment, including armor, artillery, and air support to back up the operation. At the same time, Iran was also suffering the effects of the U.S.'s Operation Staunch embargo. Conversely, the Iraqis, under command of General Hisham al-Fakhri, had the luxury of better equipment, better training, and the illegal use of poison gas.
On March 11, Iran sent in a force of 100,000 men to attack the vicinity of Majnoon Island. The force landed at al-Qurnah, where the Euphrates River skirts the highway, and made a charge for the highway. They succeeded in capturing part of the highway, but Iraq opened a counterattack with artillery, air strikes, and armor divisions from the north. This battle was also the first time Republican Guard units as reserve forces. The Iranians attacked from the Majnoun Islands, once again taking the Iraqis by surprise. They struck at the southern end of Iraq's 4th army corps, on a 12 km wide front.
The sheer ferocity of the Iranian offensive broke through the Iraqi lines. The Revolutionary Guard with the support of tanks and artillery broke through the north of Qurna on 14 March. Two days into the offensive, the Iranians penetrated 16 km (10 miles) into Iraq. That same night, 3,0000 Iranian troops reached the Tigris River, and crossed it using three pontoon bridges, one of which was capable of supporting heavy vehicles. They then succeeded in capturing part of the Baghdad-Basra Highway 8, which had proven elusive during Operations Dawn 5 and Dawn 6. However, the Iranians while being successful had dangerously overextended themselves, and were still suffering from shortages of armor.
Saddam responded by launching chemical attacks against the Iranian positions along the highway and by initiating the second "war of the cities", with an air and missile campaign against twenty Iranian population centres, including Tehran. The Iraqis had attempted to cause heavy Iranian casualties during the battle by channeling their infantry into pre-prepared artillery "kill zones". After Iran had reached their objective, they launched their counterattack.
Under General Sultan Hashim Ahmad al-Tai and General Jamal Zanoun (two of the most skilled commanders of the Iraqi military), the Iraqis launched air and artillery attacks against the Iranian positions, pinning them down. The Iraqis then launched a massive pincer attack against the Iranians, using mobile infantry and heavy artillery. The battle came to a climax when Saddam Hussein ordered the use of chemical attacks to evict the Iranians. In addition, the Iraqis also flooded the Iranian trenches with specially constructed pipes divering water from the Tigris River. Under heavy pressure, the Iranians were forced to retreat. Helicopters also inflicted heavy losses on the retreating Iranian forces, driving them back to the Hoveyzeh marshes, and destroyed the pontoon bridges. By March 16, all of the Iranian forces had retreated back to the marshes. Iran had planned to also launch a diversionary attack shortly after reaching the highway against another area, but it began too late, and that too was defeated.
Thus the Iranians were eventually driven out of their positions, and the highway was recaptured by the Iraqis. However, the Iraqis took massive losses in the air as a result. Operation Badr resulted in 10,000–12,000 Iraqi casualties and 15,000 Iranian ones The battle came to a climax when Saddam Hussein ordered the use of chemical attacks to evict the Iranians. This, along with the Iraqi counter-offensive, was able to force the Iranians back to their previous lines. The Iraqis suffered almost as heavy casualties as the Iranians, having fought a tumultuous ground war.
In response to Operation Badr, Saddam opened the second "War of the Cities" during March that year, hitting cities as far as Isfahan, Tabriz, Shiraz, and even Tehran. Iran responded in kind with attacks of her own against Iraq, mostly by launching shells and medium range missiles at the port city of Basra. While Iran had not succeeded due to the shortages of Iranian armor and air power, it convinced the Iranian leadership that their tactics were still good, as they had managed to get so far into Iraq. The Iraqis were also convinced their tactics were sound as well. Iran's weakness would remain lack of heavy equipment, and they would suffer during Iraqi counterattacks with heavy weapons.
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