The game places great emphasis on German and Soviet production; only German production is used in "War in the West" and only Soviet in "War in the East" (in each of these sub-games the German player must add or remove units to reflect historical transfers between the fronts). Once each month, the players spend production points to construct units, which are placed on giant production spiral displays to show how many months in the future they will become available – infantry units being available fairly quickly, with armour units taking longer, and air and naval units longer still.