Destruction of Irish country houses (1919–1923) April 1921, north Cork IRA leader, Liam Lynch, enraged by the destruction of several houses in reprisal for an IRA ambush declared, 'six big houses and castles of their friends, the Imperialists will go up for this.'" At least 76 country mansions were destroyed in the War of Independence; 30 "Big Houses" were burned in 1920 and another 46 in the first half of 1921, mostly in the conflict's Munster heartland, i.e. counties Cork, Kerry, Tipperary, Clare and Limerick. Historian James S. Donnelly stated in a study of the burning of over 50 country mansions in County Cork in 1919–21
Irish Civil War to defeat regular forces armed with artillery and armour. The only real conventional battle during the Free State offensive, the Battle of Killmallock, was fought when Free State troops advanced south from Limerick. Government victories in the major towns inaugurated a period of guerrilla warfare. After the fall of Cork, Liam Lynch ordered Anti-Treaty IRA units to disperse and form flying columns as they had when fighting the British. They held out in areas such as the western part of counties Cork and Kerry in the south, county Wexford in the east and counties Sligo and Mayo in the west.