A single notorious tactic was the "Devil‘s Paintbrush", a approach to walking the hearth of a machine gun forwards and backwards alongside a line of advancing troops. Canadian Captain John Coray Henry‘s Vickers gun group used this technique to repeatedly defend their place, raking many German attackers with ongoing fireplace. https://machguns.com/product/american-180-tuned-by-val-cooper-excellent-w-extras-b01033/