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
Burning of Cork 1920, the IRA's 3rd Cork Brigade ambushed an Auxiliary patrol at Kilmichael, killing 17 Auxiliaries. This was the biggest loss of life for the British in County Cork. On 10 December, British forces declared martial law in counties Cork (including the city), Kerry, Limerick, and Tipperary. It also imposed a military curfew on Cork city, which began at 10 each night. IRA volunteer Seán Healy later recalled that "at least 1,000 troops would pour out of Victoria Barracks at this hour and take over complete control of the city". IRA intelligence established that an Auxiliary patrol usually left Victoria Barracks