The
Iraq War was a protracted armed conflict that began with the
2003 invasion of Iraq by a United States-led coalition. The invasion regime toppled the government of
Saddam Hussein. However, the conflict continued for much of the next decade as an
insurgency emerged to oppose the occupying forces and the post-invasion Iraqi government. An estimated
151,000 to 600,000 or more Iraqis were killed in the first 3–4 years of conflict. The United States officially withdrew from the country in 2011 but became
re-involved in 2014 at the head of a
new coalition; the insurgency and many dimensions of the civil armed conflict continue.