This shows the National Army using field pieces borrowed from the British and firing from the corner of Winetavern Street and Wood Quay across the River Liffey. The guns opened up at first light on 28th June 1922 on the Irregulars in the Four Courts. This is famous footage and includes military vehicles, sandbags, sniper positions and destruction. The drawing of of Rory O'Connor, in command of the Irregulars in the Four Courts (later executed by the Free State). The final flames were caused more by the surrendering defenders than the National Army - cans of petrol were poured by Ernie O'Malley on public records and set ablaze.