On June 18, 1922, an Irish Republican Army (IRA) convention held at the Mansion House in Dublin concluded with a significant split. The division arose over the issue of immediately resuming an IRA offensive against the British Army. The minority faction, which comprised three-quarters of the IRA Executive, subsequently withdrew to the Four Courts. This internal schism within the IRA was a critical precursor to the Irish Civil War, marking a deepening ideological divide regarding the Anglo-Irish Treaty and the future direction of the Irish Free State. The split had profound and lasting consequences for Irish politics and society.
