WW2 German NCO (Early War)
Blitzkrieg is a method of warfare whereby an attacking force, spearheaded by a dense concentration of armored and motorized or mechanized infantry formations with close air support, breaks through the opponent's line of defense by short, fast, powerful attacks and then dislocates the defenders, using speed and surprise to encircle them with the help of air superiority. Through the employment of combined arms in maneuver warfare, blitzkrieg attempts to unbalance the enemy by making it difficult for it to respond to the continuously changing front, then defeat it in a decisive Vernichtungsschlacht (battle of annihilation).
Germany would use these tactics to devastating effect in their invasions of Poland, Denmark, France, and the Low Countries.
The mp40 wasn't issued until 1940, and wasn't standard issue for NCOs until 1941. Until then, NCOs were equipped with a rifle.