This 1935 map from Fortune magazine depicts "The Great Invasion of 19??," a three-pronged invasion from Canada, Mexico, and the Caribbean. Note the 25,000 Japanese saboteurs in California and the distinction of an Anglo-Japanese alliance as the most dangerous.

[Via Ptak Science Books. Further analysis from Ptak here.]

A 1935 map of the never-was invasion of AmericaS

A 1935 map of the never-was invasion of AmericaS

A 1935 map of the never-was invasion of AmericaS

A 1935 map of the never-was invasion of AmericaS

A 1935 map of the never-was invasion of AmericaS

A 1935 map of the never-was invasion of AmericaS