Iraq War
Around 147,000 US troops are on the ground in Iraq at this time. The 
, has been ongoing since March 20, 2003. In the early part of 2007, the US initiated a troop surge into Iraq, which sent a additional 5 US brigades into Iraq, as well as extending the stay of 4,000 Marines already stationed there. 
United States and Iraq finalize agreement to have troops out of Iraq by 2011