The 'Rainbow' War Plans: America's Secret Scheme to Fight the World
Briefly

In the 1920s and 30s, the United States developed contingency plans for potential wars with most major powers, including allies like the UK and France.
These color-coded plans served primarily as training exercises yet laid a crucial foundation for U.S. military strategy during World War II.
War Plan Black was devised for a German victory in France, anticipating threats to American territories, showcasing the extensive pre-war military planning.
The complexity of contingency plans often resulted in color confusion, as seen with War Plan Gray, which covered multiple scenarios involving Italy and the Caribbean.
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