The Concept of Blitzkrieg. Airforce attacks enemy front-line and rear positions, main roads, airfields and communication centers. Concentrated mechanized forces breakthrough main lines of defense pursuing and engaging defenders. Infantry continues to place the smoke curtains and engages in small numbers to misinform the enemy infantry and other support units attack enemy flanks in order to link up with other groups. Mechanized groups spearhead deeper into the enemy territory outflanking the enemy positions and paralyzing the rear.
Main force links up with other units encircling and cutting off the enemy.
The War in the west. The French thought that tanks were completely superfluous. This was there great weakness and in 1940 they paid for that. The landed on different places the important landing was at Narvik when they take a few victories, but the German forces were superior in the air and that was the great difference. In may 1940 the German forces attacted the Netherlands, Belgium, Luxemburg and France.