Yes, helicopters were used in World War 2, although they were still in their early stages of development and were not as widely used as in later wars. One of the most notable uses of helicopters during World War 2 was by the United States Army Air Forces (USAAF) in the Burma campaign, where they were used for medical evacuation and search and rescue operations. Helicopters were also used by the British Royal Air Force (RAF) and the German Luftwaffe, but to a lesser extent.