This model kit is in 1/700 scale. The single sprue is connected by wires at the rear of the vehicles. It includes: 12x M113AS4 APC and 2x M577 Command Vehicles.
According to Wikipedia: "The M113 is a fully tracked armored personnel carrier that was developed by Food Machinery Corp (FMC). The vehicle was first fielded by the United States Army's mechanized infantry units in Vietnam in April 1962. The M113 was the most widely used armored vehicle of the U.S. Army in the Vietnam War, earning the nickname 'Green Dragon' by the Viet Cong as it was used to break through heavy thickets in the midst of the jungle to attack and overrun enemy positions, but largely known as an APC and ACAV (armored cavalry assault vehicle) by the allied forces."