German advantage in armored warfare 1940:
Radio communications and tank commanders in protective hatches. French tanks operated independently and were virtually blind using only periscopes and few radios.
The Brit’s Matilda was a good tank for its day but the Krauts defeated them at Arras when Guderian’s men discovered the 88mm Flak Gun made a superior anti-tank weapon. One shot one kill = some 90 dead Matildas.
This sounds like a battle I read about where the Matildas were breaking through and an infantry officer, in desperation, told the AA commander to depress the muzzles and shoot at the tanks. The AA officer objected, saying their purpose was to shoot down aircraft. The infantry put a Luger to the guy's head and said that if he didn't do as he was told, his wife "would receive some interesting news". The AA officer did so - and the rest is history.