4th Tank Battalion (4th Tanks) is an armored battalion of the United States Marine Corps Reserve. Their primary weapon system is the M1A1 Abrams main battle tank and they are part of the 4th Marine Division and Marine Forces Reserve. The unit headquarters is at the Navy and Marine Corps Reserve Center San Diego, California, but other units in the battalion are located throughout the United States. Until the decision to divest the Marine Corps' armor capability, 4th Tank Battalion was the largest tank battalion in the US military with six lettered companies and an H&S Company.
Tank crew “Stepchild” has the longest confirmed live kill (Iraqi BMP) by a tank at 3,750 meters (2.33miles)
