Below: Bombing raid of steel bridge Tamakan, Kanachaburi May 1945. It was a round trip of about 2500 miles from air bases in India by RAF Liberator aircrafts from Strategic Air Force, Eastern Air Command. This raid smashed a 600 feet three span girder bridge (600 miles north Singapore) ending the Japanese supply link to Burma and Thailand.
These frequent air-raids unfortunately resulted in POW deaths.
Photos from AWM