The game begins with a first level Headquarters. Improvements to this building open new possibilities for upgrading and developing the base and its military units, as well as increasing the size of your offensive and defensive troops – which in turn opens access to new maps.
In wartime, the military headquarters gives order to your troops and enables effective coordination of your units. In 1941, a Field Army headquarters of the Red Army oversaw only five to six divisions (72,500 to 87,000 troops). In 1942 to 1943 the corps was reorganized and extended its control. Three to four rifle corps (of 7 to 12 divisions), and the same number of artillery and mortar regiments were organized under the control of Red Army staff. Control also extended to a separate artillery brigade, a separate tank regiment, and sections of special forces. Over this time, an army rarely numbered over one hundred thousand troops.