Even before the jeep went into production in 1941, the prototypes were tested as litter carriers. The tests were successful and throughout its history the jeep has been effectively used to evacuate casualties from the front or to move within base or field hospital areas when ambulance trucks were not available. An unmodified jeep can carry three litters by folding the windshield, then placing the litters either across the hood or across the area behind the driver or both. A litter can also be placed front to back from the hood into the passenger seat area with one or more across the jeep behind the driver. Pipe racks were often improvised to increase capacity to four litters or more. While there was no special production of litter-carrier jeeps in the Willys MB or Ford GPW line, this use of the jeep was frequent in World War II and in Korea.
Being carried by a jeep was a bone jarring experience that often increased the pain of the wounded. The benefit was that the patient reached a treatment point more quickly.
Casualties from New Guinea are carried by jeep to a base in Australia, World War II.