2nd was as a means of supporting offensive troops. When the extremely powerful eliminate zone was at a range of all over 500m the gun could fire even further. Because the war progressed the Machine Guns to the Western Entrance turned employed as A part of the creeping barrage tactic. https://machguns.com/product/lot-1496-rock-island-armory-m60-machine-gun-class-iii-nfa/