The First Dáil was established in 1919 by Sinn Féin members who refused to take seats in the British House of Commons. They began organizing their own government and courts in Ireland. The War of Independence began in 1919 with an IRA ambush of British forces. The IRA used guerrilla tactics against the British army. Michael Collins established an intelligence network to gather information on British spies and informers. As the conflict escalated, the British recruited the Black and Tans and Auxiliaries, whose reprisal attacks harmed many innocent Irish civilians. There were several major violent incidents in 1920-1921 until both sides agreed to a truce in July 1921 due to shortages on the IRA side and rising criticism and