Not that those tactics ever worked worth a damn. The tank destroyers ended up being too weakly armoured, and the tanks were forced to fight things they were meant to fight.
Well, yeah, that was my point. It was a double edged sword, in that it helped them steer away from accepting large, unreliable, and cost-ineffective tanks, but at the same time prompted them to think that tanks were too slow to operate sans infantry, and that Tank-killing should be undertaken by speedier vehicles. Their tactic was also probably influenced by
Plan 1919.If they had only accepted the first lesson, most Shermans would have had 76mm guns (i think they asked for relatively few because a gun with good armor piercing capability would inspire aggressive action), whereas if they only absorbed the second lesson we would have had more of these behemoths, with a gun with poor anti-armor capability and low speed but thick armor.
T23E3 Medium tank prototype armed with a 76mm gun and 76mm of frontal armor at 47 deg.