Despite their veteran status, certain Marines would be left with poor jobs upon returning from service, such as bagging groceries. The Marines also participated in war games with other military assets, such as Taggerdy's Thunder. The Marines were also responsible for rounding up civilians for internment in accordance with Executive Order 99066, but due to a shortage of manpower, the USMC would hand these contracts to private military contractors.
On the domestic front, the Marine Corps would be responsible for protecting Navy facilities, especially black sites such as Sugar Grove in Appalachia, the Mount Desert Island Naval Facility at Mount Desert Island, and the Turtledove Detention Camp in Point Lookout. Marines rapidly overran Shanghai and Nanjing, securing a major port for bringing in troops and materiel.
Despite claims of fighting a defensive war, American infantry and mechanized divisions landed in Asia, in a counter-invasion of Chinese mainland. In the 21st century during the Sino-American War, the Marine Corps would spearhead assaults into the Chinese mainland in 2074.