With the transition from the Reichswehr to the Wehrmacht intentions grew to create a standardised truck design for the army. The result was the ‘Light, Off-road-capable Standardised Truck 6x6 Type HWA 526 D', or short ‘Einheits-Diesel' that was built by almost all German truck manufacturers based on one unified design. In the early war years its robustness, reliability and superior off-road-capabilities made it a legend. This publication shows the development history, background of purchase as well as the numerous variants of the Einheits-Diesel in many hitherto unpublished photographs.