The 3rd ACR departed Ramadi in September 2003, handing it over to the 1st Brigade Combat Team, 1st Infantry Division (1st BCT, 1st ID) of Fort Riley, Kansas; however, until March, the 1st BCT fell under the command of the 82nd Airborne Division. In March, the 1st Marine Division deployed to Anbar, replacing the 82nd. While Army units in Iraq complete year-long tours, Marine units stay for seven months; in Ramadi, one Marine battalion typically augments an Army brigade.