On the philosophy of Blitzkrieg, Heinz Guderian summarised combined-arms tactics as the way to get the mobile and motorised armoured divisions to work together and support each other to achieve decisive success. In his book, Panzer Leader, he wrote:
In this year, 1929, I became convinced that tanks working on their own or in conjunction with infantry could never achieve decisive importance. My historical studies, the exercises carried out in England and our own experience with mock-ups had persuaded me that the tanks would never be able to produce their full effect until the other weapons on whose support they must inevitably rely were brought up to their standard of speed and of cross-country performance. In such formation of all arms, the tanks must play a primary role, the other weapons beings subordinated to the requirements of the armour. It would be wrong to include tanks in infantry divisions; what was needed were armoured divisions which would include all the supporting arms needed to allow the tanks to fight with full effect.