When was a civil war ambulance invented?

The first civil war ambulance was invented during the American Civil War, which lasted from 1861 to 1865. The concept of organized ambulance services for transporting wounded soldiers was significantly developed by the Union Army, particularly under the direction of Jonathan Letterman, who established a more systematic approach to medical evacuation. The use of horse-drawn ambulances became standard practice during this time, improving the efficiency of medical care on the battlefield.