- March 20, 2003: US forces invade Iraq.
- April 9, 2003: US forces pour into Baghdad.
- May 1, 2003: President George Bush says major combat operations are over in Iraq.
- December 13, 2003: Saddam Hussein is captured near his hometown of Tikrit, north of Baghdad.
- December 30, 2006: Saddam Hussein is executed.
- January 10, 2007: President Bush announces a surge of more than 21,000 troops to combat growing violence.
- July 22, 2008: Troop surge ends, leaving about 147,000 US troops in Iraq.
- November 27, 2008: Iraqi parliament approves US-Iraq security agreement which sets a date of December 31, 2011, for all US forces to leave Iraq.
- February 27, 2009: President Barack Obama says all but 50,000 troops will withdraw by August 31, 2010.
- August 31, 2010: President Obama announces end of US combat mission in Iraq. About 50,000 troops remain to train and advise Iraqi forces.
- December 21, 2010: After nine months of delays, Iraq approves a new government.
- August 02, 2011: Iraqi political leaders agree to negotiate a possible deal that would allow some US troops to remain after December on a training mission.
- August 15 2011: Bombings and attacks in 17 Iraqi cities leave more than 60 people dead, raising concerns about security after the US pullout.
- September 1, 2011: The US military says no American service members died in Iraq in August, the first month with no US military fatalities there.
- October 21, 2011: President Obama confirms all US troops with be withdrawn by the end of the year.
- November 29, 2011: US Vice President Joe Biden tells Iraqi leaders the two countries are embarking on a "new path" as the US nears completion of its withdrawal.