The Airlords of Han & Armageddon 2419 A.D.

Sometime after World War I, although the allies won, USA were devastated and collapsed economically, which was exploited by the technologically advanced "Mongolians," who started their campaign of world conquest. In 2019 the Mongolians attacked the US using fleets of airships armed with disintegrator rays. After conquering the US, these "Airlords of Han" ruled North America as a province of the wo...