"Iraq's chemical, biological, and nuclear weapons programs, together with Iraqi long-range missile development and support for Al Qaeda terrorism, were the primary justifications put forward for military action. On March 17, 2003, President Bush issued an ultimatum demanding that Saddam Hussein and his sons depart from Iraq within 48 hours. On March 19, offensive operations began with air strikes against Iraqi leadership positions. By April 15, after 27 days of operations, coalition forces were in relative control of all major Iraqi cities and Iraqi political and military leadership had disintegrated. On May 1, 2003, President Bush declared an end to major combat operations. There was no use of chemical or biological (CB) weapons, and no CB or nuclear weapons stockpiles or production facilities have been found. […] According to DOD [Department of Defense], as of January 2, 2007, 3,004 U.S. troops had died in Iraq operations. There have been more than 22,500 U.S. personnel wounded or injured since military operations began. Non-U.S. Coalition fatalities have totaled 250, while Iraqi security force fatalities from June 2003 through December 2006 are estimated to be 5,952. The latest unclassified DOD statistics indicate that as of January 2, about 128,500 U.S. troops are in Iraq, and an additional 20,000 military support personnel in the region. An additional 21,500 troops are now scheduled for accelerated deployment of over the next few months. About 14,100 non-U.S. troops are also in theater, with Britain being the largest contributor. Other nations contributing troops include Albania, Armenia, Australia, Azerbaijan, Bosnia-Herzegovina, Bulgaria, the Czech Republic, Denmark, El Salvador, Estonia, Georgia (Gruzia), Japan, Kazakhstan, Latvia, Lithuania, Macedonia, Moldova, Mongolia, Poland, Romania, Singapore, and Slovakia, South Korea, and Ukraine. This report will be updated as events warrant."
CRS Report for Congress, RL31701