Helicopters have been proving their worth daily in both civilian and military use. One of the most important roles a helicopter fulfills is that of medevac. An airborne ambulance that can get there faster, safer and smoother than by land. The first helicopter medevac was performed during World War 2 in Burma. In April 1944, a U.S. Army Sikorsky YR-4B helicopter rescued 3 wounded troops from Mawlu. The helicopter could only carry one casualty at a time, so had to make repeat journeys to get everyone to safety, but they persevered and got everyone out. After that, the helicopter was the vehicle of choice for fast medevac from combat situations, as well as at home.