For the period 1925 to 1955 using 2mm to 1/35th scale. Battalion to Corps level.
These rules are more general and careful in their approach to weapon performance, do not use one model equals one real tank/weapon or man. They do not use an alternate move fire system, where a coup-de-grace can be delivered without a single shot being returned.
They can be played in real time or faster, and you can easily use a division or corps. The rules ignore the minutiae characteristics of equipment ignored by real life troops. These rules focus on real life people and the equipment they used and how they used it not the other way around. Any advantage in performance of one piece of equipment over another is compensated partly by the factors of grading, or a difference in scale representation, or that the ‘enemy’ will produce equipment to redress the balance. Good tactics, tactical thinking and careful planning will more than compensate for an enemy’s technical or numerical advantage. Outwit and off-foot your opponent. Develop battle strategy and develop the courage to see it through. Commanders who change course half way through a battle generally usually come to grief.