The concept of Blitzkrieg or lightning war was developed because the Germans didn't want to face another trench war such as the one experienced in World War 1. Instead of facing years of slogging in trenches, Germany wanted Britain and France to be beaten back quickly and efficiently. In a Blitzkrieg speed was the most vital thing, as the idea of this attack was to create panic and confusion as fast as possible. It was important for Hitler that the war was to be both short and limited as Germany didn't have enough supplies or weapons to fight a long war on more that one front.
Strategy and tactics.
Blitzkrieg also known as lightning war aimed to inflict a complete defeat on an enemy through one single, powerful offensive. To achieve this the German army needed firepower, mobility and most importantly speed. The German army came up with this strategy so they were able to avoid the costly and indecisive trench warfare of 1914-1918. Blitzkrieg always avoided the enemy's strong points and targeted the weaker resistance in order to sustain the momentum of the assault. For example the French built a series of extensive underground forts (maginot line), which they believed would protect them. It might have done if Germany had decided to attack the line instead of attacking France at Sedan on Frances border with Belgium. The Maginot line only protected France along its border with Germany, not Belgium. The assault concentrated on the enemies back line and rear areas to break the lines of supply and communication. Once achieved less mobile forces were able to destroy smaller isolated groups of resistance. Blitzkrieg also required new technology and commanders with tactical vision and flexibility to exploit opportunities and also over come obstacles so that they were able to sustain the momentum.
Air force.
The most vital part of blitzkrieg was probably the air force. They were the first to attack the enemy, destroying strong resistance so tanks and ground troops could then enter.
