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The Civil War was won by pro-Treaty forces
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On 29 December 1937, the new Constitution of Ireland came into force, which replaced the Constitution of the Irish Free State and called the state Ireland, or Éire in Irish
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During World War II Ireland remained neutral. In 1949 it left the Commonwealth and became the Republic of Ireland
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After decades of sullen hostility relations between the Republic and the Unionist-controlled North began to improve.
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In Derry, Northern Ireland, 26 civil-rights protesters and bystanders were shot by soldiers of the British Army.