A total of 6,100 troops are required to sustain a single U.S. base in Afghanistan after 2014, primarily to provide security, life-support, and limited advisory capabilities to Afghan forces, but without supporting meaningful counter-terrorism operations. The analysis outlines the significant military personnel required for airfield operations, base security, helicopter support, medical services, and essential support functions. Key tasks include maintaining operational capability at Bagram Airfield and conducting intelligence and strike operations against identified terrorist threats.