Britain and the United States used the C-54.
The C-54s flew 79,642 / ~80,000 ocean crossings and only lost three aircraft.
The Royal Air Force (RAF) received 23 C-54s and designated them Skymaster Mk. Is. Winston Churchill used one.
C-54s were used extensively during the Berlin Airlift.
The last of the C-54s were withdrawn from active service.