The Douglas C-54 Skymaster is a four-engine transport aircraft developed during World War II. It was primarily used by the United States Army Air Forces for cargo and troop transport. The C-54 could carry up to 50 passengers or 10,000 pounds of cargo, making it a versatile choice for military operations. After the war, the C-54 was adapted for civilian use and became popular with airlines. It played a significant role in the Berlin Airlift, delivering supplies to West Berlin during the Soviet blockade. The aircraft is a notable example of the Douglas Aircraft Company's contributions to aviation history.