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"Earlier, in March 1918, the promise of fuel accessibility had prompted Franklin to explore the acquisition of petroleum-rich Curacao, in the lower Caribbean, from the Dutch, using as precedent Wilson's purchase (as the renamed Virgin Islands) of the Danish West Indies in January 1917, ostensibly to protect approaches to the Panama Canal. Despite the disapproval of Daniels, who read imperial designs on the order of TR into the proposal, Roosevelt suggested that Marley Hay, a submarine expert he knew, who was planning to travel to the Netherlands, raise the matter there. Concerned that the Germans would view a sale as a violation of Dutch neutrality, the Netherlands foreign minister declined to discuss it. It was yet another example of FDR's venturing beyond his brief." Stanley Weintraub, Young Mr. Roosevelt: FDR's Introduction to War, Politics, and Life https://books.google.com/books?id=xUUPAAAAQBAJ&pg=PT134
AHC: The US does acquire Curacao--maybe before the US enters the War (so it's just a sale from one neutral to another) or possibly after the War ends (so German objections don't matter).