Moreover, the tactics that underpinned the creation and training of tank destroyer battalions had been undone by the experiences of the Ardennes. Stopping or slowing a blitzkrieg style armored thrust became the responsibility of combined-arms formations, in which infantry, artillery and armor worked together in a mobile defense. While tank destroyers made up an important part of such a defense, it became clear that tanks were better suited because of their all-round ability to counter-attack an enemy, as well as provide a mobile defense, of which they were equal to the tank destroyers (with the exception of the M36). Tank destroyers, being lightly armored, were not suited to a counter-attacking role, and were limited to providing mobile defense only. The confusion of the Ardennes battle also resulted in the creation of many ad hoc infantry/armor formations, which was in contrast to the tactic of having tank destroyers in a well organized formation situated well back from the front lines. The result of this experience led military strategists to conclude that neither static anti-tank positions at the front line, nor mobile battalion-sized tank destroyer units operating in the rear, were the best solution to enemy armored thrusts.