This training circular (TC) provides the unit commander, vehicle commander, and the vehicle driver with the basis for developing a tracked combat vehicle driver training program and can assist commanders in selecting highly qualified drivers. TC 21-306 is a result of the Chief of Staff of the Army’s (CSA) direction to the Training and Doctrine Command (TRADOC) to develop tracked and wheeled vehicle driver training programs, to include the development of training support packages (TSPs) that will standardize driver training Armywide. The TSPs described in this publication fulfill that requirement for tracked vehicles by providing units with flexible training programs that can be implemented as stand-alone courses or integrated into existing training.