The Battle of Basra began on 25 March 2008, when the Iraqi Army launched an operation (code-named Saulat al-Fursan, meaning Operation Charge of the Knights in Arabic) to drive the Mahdi Army militia out of the southern Iraqi city of Basra. The operation was the first major operation to be planned and carried out by the Iraqi Army since the invasion of 2003.

Coalition and Iraqi aircraft patrolled the skies above Basra providing intelligence and carrying out air strikes in support of Iraqi forces on the ground. Coalition forces provided embedded military transition teams (MiTTs) in Iraqi Army units and American special forces also conducted joint operations with ISOF units.

Iraqi forces faced heavy resistance from Mahdi Army militia inside the city and the offensive stalled, requiring American and British air and artillery support, eventually resulting in a stand-off. More than 1,000 casualties resulted in six days of heavy fighting.Sudarsan Raghavan and Sholnn Freeman - U.S. Appears to Take Lead in Fighting in Baghdad - The Washington Post

Following a ceasefire negotiated in Iran on 31 March, Muqtada al-Sadr withdrew his fighters from the streets, but had gained a major political victory. However, the Iraqi Army, reinforced with brigades from other parts of Iraq, including the 1st Division from al-Anbar, continued to carry out slower, more deliberate clearing operations in militia strongholds. The Hillah Special Weapons and Tactics Unit, as well as Iraqi Special Operations Forces (ISOF), carried out a number of targeted raids on militia leaders. By 20 April, the Iraqi Army had taken control of the last major district controlled by the Mahdi Army, and by 24 April, Iraqi forces claimed to be in full control of the city centre.

Background

During the invasion of Iraq, Basra was the first city to fall to Coalition forces, following two weeks of fighting between the British and Iraqi forces. Following the collapse of the Iraqi government, a number of Shi'ite Islamist groups, including the Sadrist Trend led by Muqtada al-Sadr, the Supreme Islamic Iraqi Council and Fadhila, were able to expand their influence in Basra, solidifying their standing following the January 2005 elections. Basra became a center of smuggling activity in Iraq, including cigarette smuggling, opium from Afghanistan via Iran, oil and gas smuggling, illegal weapons, and other criminal rackets. Violence steadily increased as the three parties vied for control of Basra's resources, continuing through 2005 and 2006. At the same time, attacks on British forces increased following the use of highly sophisticated explosively formed penetrators (EFPs) smuggled in by Iran restricting the British to their bases, which militia then targeted with rocket and mortar fire on a regular basis. The Mahdi Army also enforced strict Islamic rule in Basra, threatening women for wearing makeup and punishing individuals for playing secular Western and Arabic music.

In late September 2006, British forces launched Operation Sinbad, a six-month operation originally intended to purge militia from the Iraqi police but eventually targeted the militias directly. However, British forces did not have sufficient numbers and despite a temporary decrease in violence, British troops were again under attack and withdrew to their positions at the palace and the airport.

The UK military returned control of Basra to the Iraqi forces in December 2007 and concentrated its forces at the city airport.Iraq forces battle Basra militias – BBC

In February 2008, Muqtada al-Sadr's followers renewed a ceasefire which had been declared in August 2007, under which they pledged not to attack rival armed groups or American forces in Iraq. General Qasem Soleimani of the Iranian Revolutionary Guard Corps (IRGC) ordered this truce. The truce, however, came under strain in the weeks before the battle as Iraqi forces detained "rogue" militia members.

Preparations In 2007, the Iraqi Army moved 4 brigades, including one of its two tank brigades from the 9th Division, and a special forces battalion to Basra. The existing brigade was transferred to Wasit province to break its ties to militia groups in Basra. The Iraqi National Police also moved two battalions to Basra.Basrah: Missing the Iraqi Security Force Deployment - Long War Journal

In August 2007, the Iraqi Army established the Basra Operational Command, a Corps-level command in charge of 2 Iraqi Army divisions (the 10th and the 14th), under the command of Lt General Mohan al-Furayji.

The Vice Chief of Staff of the Iraqi Joint Staff said "We do not have enough forces there. That is why we are having a new division, the 14th Division, to be built in Basrah, especially with the possibility that the British might be leaving us in time."Iraqi Security Forces Order of Battle: September 2007 Update - Long War Journal The formation of this new division was not scheduled to be completed before June 2008 and was accelerated to deal with the upcoming operation. The 3rd brigade of the division graduated from the Besmaya Combat Training Center Program on 13 February 2008, five weeks before the battle - MNF-I and the 4th brigade was still forming.A look at Operation Knights' Assault - Long War Journal

In mid-March, the deputy prime minister, Barham Salih, called for a "very strong military presence in Basra to eradicate the militia". He also indicated possible Coalition force involvement in the plan. On Thursday, 20 March, Lt General Mohan al-Furayji warned his troops to prepare for a "final battle" in Basra to defeat Shia militia before provincial elections in October later that year.Kim Sengupta The final battle for Basra is near, says Iraqi general The Independent

On 22 March, the Iraqi prime minister Nouri al-Maliki met with the commander of US forces in Iraq, General David Petraeus. During the meeting, al-Maliki explained that the impending operation would be an "entirely Iraqi affair ... to take on criminals and gang leaders" in Basra. General Petraeus advised al-Maliki not to rush into a fight and that the large scale movement of Iraqi forces would put strains on the Iraqi logistical and command and control networks, as well as "putting at risk" a lot of the gains made since the start of the US "Surge" in 2007 by threatening the ceasefire imposed on the Mahdi Army by Muqtada al-Sadr.MICHAEL R. GORDON, ERIC SCHMITT and STEPHEN FARRELL - U.S. Cites Planning Gaps in Iraqi Assault on Basra - The New York Times

The Mahdi Army had long been well-entrenched in their districts with sniper positions, ambush sites, roadside bombs and booby trapped buildings.

During the reign of Saddam Hussein over 202,000 refugees fled Iraq to refugee camps in Iran.UN refugee agency closes camps in Iran as Iraqi exiles return home - UN Many of the young men and children who lived in these camps were recruited by Iran's Revolutionary Guard Corps in anticipation of repatriation back into Iraq.

Timeline of the battle Note that not very much is actually known about the tactical operations. Because so few Coalition forces were involved in the operation there were no embeds in Basra and most broadcasts and print reports originated from Baghdad. Field reports from Basra have generally been filed by news agency "stringers", sometimes of dubious credibility.

24 March The Iraqi Prime Minister Nouri al-Maliki and the commander in charge of all Iraqi ground forces, Lt General Ali Ghaidan Majid, arrived in Basra to oversee the operation, taking over from the Basra police chief, Maj. Gen. Abdul-Jalil Khalaf, and the head of the Basra Operational Command, Lt. Gen. Mohan al-Furayji. An indefinite nightly curfew was announced in Basra, as well as in al-Kut and Nasiriyah. Routes into Basra were sealed off, according to reports, and vehicles were also prohibited from entering the city. Sadr's organization promised violent retaliation in Basra if members of his Mahdi Army were targeted.Qassim Abdul-Zahra, Iraqi PM removes commanders in Basra amid deteriorating security Associated Press

25 March In the early morning, security forces entered the neighbourhood of al-Tamiya, a Mahdi Army stronghold. Shortly after, fighting erupted and the clashes later spread to five other neighbourhoods, including al-Jumhuriya, Five Miles and al-Hayania, the Mahdi Army's main stronghold in Basra.Iraqi forces battle Basra militias | Al Jazeera English News

Nassar al-Rubaie, an official in al-Sadr's political movement, accused the Iraqi government of trying to weaken the Sadr trend ahead of provincial elections. In response to the fighting the political movement of powerful Shiite cleric Muqtada al-Sadr launched a nationwide civil disobedience campaign across Iraq to protest the raids and detentions against the Mahdi Army.Iraqi raids anger Shiite militia | CNN

26 March By late in the evening, the assault on the port city stalled, as Shiite militiamen in the Mahdi Army fought day-long hit-and-run battles and refused to withdraw from their positions. The Mahdi Army fighters also managed to overrun a number of police stations and checkpoints.Iraqi Army’s Assault on Militias in Basra Stalls - The New York Times

The Iraqi Prime Minister set a 72-hour deadline for militia in Basra to surrender their arms. A statement from the Basra Operational Command quoted Maliki: "We are not going to chase those who hand over their weapons within 72 hours. If they do not surrender their arms, the law will follow its course."Iraq PM gives Shiite militia 72 hour deadline to lay down arms - AFP via Google News

27 March By 27 March, residents in the city were beginning to run out of food and water. They said Iraqi army deserters broke into shops, took food and water, then set fire to shops and cars on the street.Fresh clashes grip southern Iraq - BBC News An oil pipeline near Basra, which carries oil for export, was damaged by a bomb.

Mahdi Army fighters paraded around the wreckages of two Iraqi Army AMZ Dzik armored vehicles and a BMP infantry fighting vehicle which were seen destroyed on the streets. A captured Iraqi Army Humvee along with 20 Iraqi soldiers that were said to have surrendered voluntarily to the militants were also presented. At this point, reports were circulating that Iraqi policemen and soldiers were refusing to fight or deserting their posts and abandoning their uniforms. Overnight, the chief of the police force escaped a roadside bomb attack on his convoy just outside the city which killed three of his bodyguards. The deputy police chief was also attacked in central Basra.Iraq's Basra police chief survives bomb attack - Xinhua News

Late in the evening an Iraqi Army helicopter was shot down by militants.Saturday: 2 US Soldiers, 171 Iraqis Killed, 289 Wounded - Antiwar.com

28 March On Friday, Major Tom Holloway, spokesman for the British Armed Forces, reported two air strikes were made in support of Iraqi forces in Basra overnight. The air strikes, which occurred at 21:00 on Thursday and shortly after midnight involved US Navy or Marine F/A-18 fighters firing cannon rounds at a militia stronghold and on a mortar team in Basra. Major Holloway reported coalition aircraft had been flying surveillance operations over Basra since the beginning of the fighting in support of the Iraqi offensive.Erica Goode - US Airstrikes aid Iraqi Army in Basra - The New York Times

29 March