Blitzkrieg is a military tactic of an all-mechanized and armored force concentrating its attack on a small section of the enemy front. Then, when the latter is pierced, the assault is concentrated on its flank. Blitzkrieg is a German word which means “lightning war” and was first used by the German Army in World War II. Designed to hit hard and move on instantly, Blitzkrieg is based on speed, surprise, co-ordination and movement, using fast tanks and supported by planes and infantry soldiers. This tactic was designed by Heinz Guderian, a German army officer who had written a military book which was called "Achtung Panzer." It got into the hands of Hitler.
Having spent four years fighting a static war, Adolf Hitler was spellbound. Guderian told him that he could get to the French coasts in a matter of weeks if they attacked France following the Blitzkrieg tactic, which was summarized by Guderian as “Nicht kleckern, klotzen!,” “Don’t fiddle, hit hard.” In the Blitzkrieg, the Germans referred to a “Schwerpunkt” or focal point, which was a center of gravity upon which all the effort was concentrated, using ground troops, armored vehicles, and planes.
In Blitzkrieg, a specific target is selected. Then bombers are sent to soften up the enemy, destroying rail lines and communication centers. This was done in World War II when the German tanks were closing in on the Schwerepunkt and the planes withdrew at the last minute. In this way the enemy did not have time to recover as they were smashed by tanks and infantry.

[...] shattered by the German military tactic used for the first time in history which is known as Blitzkrieg (Lightning [...]