The Battalion Combat Series (BCS) is a simulation of grand tactical warfare from the advent of mechanized armies in the late portion of World War I to the present.
It was created to show that there is a level of warfare that has its own distinct nature and behaviors between the tactical and operational levels of war. It is neither a large scale version of one, nor a small scale version of the other.
BCS attempts to find the best balance between simulation accuracy and playability and not compromise either unduly.
Ground Scale is from 500m to 2 km per hex, depending on the terrain being shown. Combat Units are generally Battalions, with some Companies. Game Rules will state the exact scale for that game.