During World War I, the Allies used thousands of Model T cars and trucks because of their low cost and ease of repair. The ambulance version's light weight made it well-suited for use on muddy and shell-torn roads in forward combat areas. If stuck in a hole, a group of soldiers could lift one without much difficulty. By Nov. 1, 1918, 4,362 Model T ambulances had been shipped overseas.
When the United States entered World War I, Ford Motor Company personnel collaborated with the U.S. Surgeon General's Office, and with drivers who had served on the frontlines in France, to design a Model T-based ambulance suited to battlefield conditions. Ford built 5,745 ambulances for the Allied armies during the war and another 107 for the Red Cross.