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So what if US Army re-organized its rifle squads into three fire teams built around the BAR in 1944 before D-Day? The reason for this is in preparing for D-Day the Army decides to add two more Browning Automatic Rifles (BAR) to its infantry rifle squads to add more firepower to the assault companies on D-Day.
Notice I said adopt because heaven forbid the Army should copy something from the Marine Corps! What would be the long term effects after the war?