Revitalised from about 1910, the IRB was the chief organising force between the Easter Rising of 1916, and was a major influence during the 1919-21 Irish War of Independence. Its president at that time was Michael Collins. The IRB split and effectively disappeared during the Irish Civil War in the Irish Free State that followed the partition of Ireland into the 26 counties of the Free State and the 6 counties of Northern Ireland
BBC History site: " class="external">http://www.bbc.co.uk/history/war/easterrising/profiles/po17.shtml
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