Guerrilla Days In Ireland, Tom Barry

"Many statements have been made by Ministers and Generals in various countries on the necessity for long periods of training before even an infantry soldier is ready for action. This is utter nonsense when applied to volunteers for guerrilla warfare. After only one week of collective training, this Flying Column of intelligent and courageous fighters was fit to meet an equal number of soldiers from any regular army in the world, and hold its own in battle, if not in barrack yard ceremonial. It's camp training now completed, the Flying Column was ready to seek out the enemy."

Page 22, last paragraph.