 An average of 145 were supplied to every Army infantry regiment.Jeeps were used for many purposes, including cable laying, saw milling, as firefighting pumpers, field ambulances, tractors and, with suitable wheels, would even run on railway tracks.An amphibious jeep, the model GPA, or "seep" (Sea Jeep) was built for Ford in modest numbers but it could not be considered a huge success—it was neither a good off-road vehicle nor a good boat.