The 3rd Brigade Combat Team, 10th Mountain Division is an infantry brigade combat team of the United States Army based at Fort Drum, New York. It is a subordinate unit of the 10th Mountain Division. Activated in September, 2004 as part of an expansion of the 10th Mountain Division, the brigade was quickly deployed to Afghanistan as a part of Operation Enduring Freedom, and had its first tour extended during the deployment. The brigade had been planned to deploy to Iraq in support of Operation Iraqi Freedom in 2009, but it was rerouted back to Afghanistan for a second tour in the eastern regions of the country, in order to prepare for additional troops to move into the region. In 2011 it was deployed back to Afghanistan in the southern region of the country.