The document provides an overview of the Anglo-Irish War/Irish War of Independence that occurred from 1919 to 1921. It discusses the background leading up to the war, including the Easter Rising of 1916 and the establishment of the First D叩il parliament in 1918. The document then outlines some of the key events and escalating violence during the war, including the spread of conflict around Ireland and the collapse of British administration in 1920. It also briefly mentions some of the major figures involved like Michael Collins and the role of Sinn F辿in.