The Douglas DC-3 is a twin-engine propeller aircraft that first flew in 1935. It was designed for commercial aviation and quickly became popular for its reliability and efficiency. The DC-3 could carry passengers and cargo over long distances, revolutionizing air travel in the 20th century. During World War II, the DC-3 was adapted for military use and designated as the C-47 Skytrain. Its versatility allowed it to serve in various roles, including troop transport and cargo delivery. The aircraft remains a significant part of aviation history and is still in use today by enthusiasts and operators around the world.