The war tactic that was used in WWII was called "Blitzkrieg" which was used by the Nazi Party (comes from the German term for Lightning War). Blitzkrieg was an offensive that used both air and ground attacks. Ariel bombardment was often used to disrupt and prevent the enemy from concentrating its forces. Armored would be massed together in large columns.
The armored column would attack the enemy line at a weak spot and break through due to the weak local superiority. The tanks would then spread out dispersing the enemy's forces even more. They would then capture and destroy command posts, ammunition depots, and artillery positions, as well as attack the front lines from the rear. This would make it impossible for the defending front line troops to offer a coordinated resistance on the attacking infantry.