Fort Hood, leaving its Deputy Commanding General behind as the new Train Advise Assist Command South. Operation Enduring Freedom – Afghanistan (OEF-A) ended in late 2014. Operation Freedom's Sentinel (2015–2021) After the completion of Operation Enduring Freedom – Afghanistan, the new US deployment to Afghanistan was known as Operation Freedom's Sentinel. In June 2015, the division element in TAAC South was relieved by an element from the 7th Infantry Division Headquarters. 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 supported both Operation Freedom's Sentinel and Resolute Support, and was the Army's only currently-deployed active duty Sustainment Brigade until US forces withdrew in 2021. Operation Inherent Resolve The division's 3d BCT deployed in February 2017 to Kuwait, and elements of 3ABCT supported operations in Iraq to retake Mosul from ISIS. Global missions The 1st Cavalry Division currently holds three of the active Army's ten armored brigade combat teams. The division provides the Army and Combatant Commanders with trained and ready forces. In April 2014, 2–5 Cavalry from 1st BCT, 1CD deployed to Europe to support Operation Combined Resolve II, a NATO exercise in southeastern Germany. In October 2014, 1CD returned to Europe to support its NATO partners in another pair of exercises, this time participating in Operations Combined Resolve III and Atlantic Resolve with the majority of 1ABCT. A battalion task force from the Combat Aviation Brigade, 1st Cavalry Division deployed to Germany in November 2015; it participated in Atlantic Resolve, then stayed in Germany for the next nine months to provide aviation support to US and NATO forces across Europe. In June 2015, the 2d BCT was the first rotational brigade deployed to South Korea, relieving the 1st BCT, 2d Infantry Division as it inactivated. The 2d BCT deployed for nine months; in February 2016, the Army called on the First Team again, and the 2d BCT was replaced by the 1st BCT on