Just one notorious tactic was the "Satan‘s Paintbrush", a way of walking the fireplace of the machine gun backwards and forwards together a line of advancing troops. Canadian Captain John Coray Henry‘s Vickers gun team utilised this process to repeatedly protect their posture, raking numerous German attackers with continuous fireplace. https://machguns.com/product/colt-ar15a2-converted-to-full-auto-sp326814/