The 33rd Infantry Brigade Combat Team is a unit of the Illinois Army National Guard, which perpetuates the history of the 33rd Infantry Division. Known as the 66th Infantry Brigade until 2005, it is one of the brigades of the 35th Infantry Division. The brigade was re-activated under the Transformation of the United States Army and subordinated to the Illinois Army National Guard. The 33rd Infantry Brigade Combat Team deployed to Afghanistan in December 2008 in support of Operation Enduring Freedom and re-deployed in August 2009.