Due to some unforeseen circumstances (Bismarck feeling ill, King William having read some rousing pirate novels, whatever), Prussia demands and receives the French colonies in the New World: Martinique, Guadeloupe (with St.M and St.B), Guyana.
What happens? Pro-French uprisings when the new German governor appears? Pro-independence uprisings? What will the US do? Has either Germany or US anything resembling the necessary fleet for a naval conflict?