- 1915 25 Apr Allied troops land on the Gallipoli peninsula, Turkey, beginning the disastrous Dardanelles campaign.
- 1920 25 Apr Britain is given mandates for the former Ottoman territories of Mesopotamia (Iraq) and Palestine.
- 1953 25 Apr Geneticists James Watson and Francis Crick publish their discovery of the structure of DNA.
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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