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War Plan Gold was one of the US colour-coded plans. WPG called for a potential naval war with France.
According to Avalanche Press:
"The United States had stood alongside its 'oldest ally' during the First World War, but in the years immediately afterwards the Navy looked at the potential for radical politicians to change France from friend to foe. Also, the peace negotiations which followed the war revealed deep underlying tensions between the Americans and their European allies; some of the more paranoid came to believe the next war would be between Europe and America."
You need to create a timeline where the US is forced to activate War Plan Gold. No ASBs.