In March 1942, the U.S. was fully engaged in the second World War, fighting against Japan and Germany. The Pearl Harbor attack had happened just months prior, and now there was a U-boat war happening right off the eastern seaboard of the United States.

Americans were understandably nervous. Then Life Magazine scared the heck out of its readers with an article about what would happen if the Nazis and the Japanese decided to invade.

In an article titled "Now the US must fight for its life," Life shared maps of a potential invasion that must have been pretty terrifying to John Q. Public in the early days of the war.

The magazine, fortunately, was way, way off. The Germans did investigate a potential invasion of the U.S., aided by the the long-range Amerika bomber, but they eventually found such an endeavor too costly, especially as the war continued to go poorly for them.

Though German U-boats were sinking some ships off the American coast, fielding a long-range bomber against the U.S. needed a nuclear bomb underneath it to be truly effective, which the Germans never figured out. And Berlin simply didn't have the resources or manpower to stage a feasible land invasion — a point nailed home by the fact that Germany had previously scrapped an invasion plan for England in 1941.

Regardless, it was a scary time for Americans in March 1942, and it was the heyday of military propaganda. So here is how Life imagined such an operation: