The 2003 invasion of Iraq lasted from 20 March to 1 May 2003 and signaled the start of the Iraq War, which was dubbed Operation Iraqi Freedom by the United States (prior to 19 March, the mission in Iraq was called Operation Enduring Freedom, a carryover from the War in Afghanistan). The invasion consisted of 21 days of major combat operations, in which a combined force of troops from the United States, the United Kingdom, Australia and Poland invaded Iraq and deposed the Ba'athist government of Saddam Hussein. The invasion phase consisted primarily of a conventionally fought war which concluded with the capture of the Iraqi capital of Baghdad by American forces.