The Saruvian Empire — a fictional analog for Nazi Germany — has conquered the entire mainland of the United Sovereign Territories, a fictional analog for the United States. Only the southern island of Johnstown remains free. The UST establishes a small forward base on a deserted island between the two powers and uses it to strike at Saruvian supply lines. All weapons, uniforms, medals, and military terminology are drawn from the real World War II era, transposed onto the fictional nations.