In September 2016, the 1st Cavalry Division Headquarters deployed again to Afghanistan, this time with the 1st Cavalry Division Sustainment Brigade alongside it. The headquarters serves as the United States Forces – Afghanistan National Support Element, and is also responsible for Bagram Airfield, the largest US military base in Afghanistan. It supports forces serving in the United States' Operation Freedom's Sentinel and NATO's Resolute Support Mission, enabling both the international effort to train, advise, and assist the Afghan National Defense and Security Forces and the counterterrorism fight. The 1st Cavalry Division Sustainment Brigade also supports both Operation Freedom's Sentinel and Resolute Support, and is the Army's only currently-deployed active duty Sustainment Brigade.