The tank is an M4 Sherman which has been heavily modified over the years. Unlike other Fallout Tactics vehicles it possesses a weapon. A 75mm cannon which can lob a shell over a reasonable distance. It was clearly of Brotherhood ownership at some point due to it having their insignia displayed upon it. The tank was found abandoned near the Reaver Movement HQ in Newton by a Brotherhood of Steel squad, led by the Warrior, came and repaired it, placing it under their control.