The M939 is a military truck series used by the United States Army, designed for tactical and logistical support. It is part of the Family of Medium Tactical Vehicles (FMTV) and is known for its durability and off-road capabilities. The M939 series includes various models, such as cargo trucks and tractor trucks, which can transport troops and equipment. These trucks are powered by a diesel engine and feature a 6x6 wheel configuration, allowing them to navigate challenging terrains. The M939 series has been utilized in various military operations since the 1980s, providing essential support in both peacetime and combat situations.