- 1918 1 Apr The Royal Air Force is created from the Royal Flying Corps and Royal Naval Air Service.
- 1945 1 Apr US forces invade the Japanese island of Okinawa at the start of the bloodiest battle of the Pacific war.
- 1991 1 Apr The Warsaw Pact, created in 1955, is dissolved by common agreement of its members.
World War One Centenary
- Find out more about how the BBC is covering the World War One Centenary, and see the latest programmes and online content
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