The M113 is a fully tracked armored personnel carrier that formed the backbone of the U.S. Army's mobile infantry units from the time of its introduction in the 1960s. The M113 was the most widely used armored vehicle of the U.S. Army in the Vietnam War, earning the nickname 'Green Dragon' among the Viet Cong, and known as an APC and ACAV (armored cavalry assault vehicle) by the allied forces, as it was used to break through heavy thickets in the midst of the jungle to attack and overrun enemy positions.
