Friday, February 25, 1921, dawned cool and crisp with a crystal clear blue sky near Coolnacahera, County Cork. Seán O’Hegarty, commanding officer of the 1st (East) Cork Brigade, stood on a high hill with numerous limestone outcroppings and peered off into the east, his right hand up to block the bright rising morning sun. As he looked down on the stone walls along the road below, flashes of sunl…