"Varying media estimates of military forces in Iraq have raised concerns about the actual number of troops deployed in Operation Iraqi Freedom (OIF). Interest in troop level deployments continue in 2008. Last year, a major announcement on a surge in troop deployments to Iraq by the President Bush included a planned gradual increase of more than 20,000 U.S. troops on the ground in Baghdad and Anbar province over several months. Since the 'new strategy for Iraq' speech by the President on January 10, 2007, troop deployments gradually increased during the months of February through October in 2007 but decreased beginning in November 2007. This report provides solely Department of Defense (DOD) statistical information on U.S. forces serving in Iraq. It also provides brief official information on the military units scheduled for the next rotation of duty into Iraq. As of January 2, 2008, according to DOD, the United States had 155,846 troops stationed in Iraq -- 137,709 active component and 18,137 National Guard or Reserves. For security reasons, DOD does not routinely report the composition, size, or specific destination of military forces deployed to the Persian Gulf. This report will be updated upon receipt of new DOD data. For additional information on U.S. forces, see CRS [Congressional Research Service] Report RL31701, 'Iraq: U.S. Military Operations', by Steve Bowman."
CRS Report for Congress, RS22449