As befitting a mod that covers the post-WW1 era of history and the five great conflicts of the period (the Third Afghan War (1919CE), the Russian Revolution and Civil War (1917-1921), the Chinese Civil War (c 1913-1947CE) and the Greco-Turkish War (1919-1922CE), as well as the colonial (mis)adventures of Britain and France in Western Asia), Fallen Giants has a unit balance system that encapsulates the military developments of the era - modern armoured warfare is on the rise, but tanks remain costly, and armoured cars very much function as the "heavy cavalry" of the era, meant to suppress infantry and machine guns but not being cost-effective enough to replace horse cavalry entirely.
In addition, the evolution of warfare at air and sea is also acknowledged, with Britain, France and Japan having access to Aircraft Carriers, and Germany being able to research her way into some of the most effective bomber and submarine designs of the era.