AHC: Portuguese-American War

Your challenge is to find a way to have the United States & Portugal go to war. It can just be the two of them or part of a larger war, it just needs to have them fight each other. There are no restrictions on when the PoD is.
 
Whatever diplomatic/political developments needed for a Central Powers-aligned USA would fulfill this just fine, since Portugal sided with the Entente. Granted, they'd probably only fight at sea, maybe, but that seems to be good enough.
 
Whatever diplomatic/political developments needed for a Central Powers-aligned USA would fulfill this just fine, since Portugal sided with the Entente. Granted, they'd probably only fight at sea, maybe, but that seems to be good enough.

Portugal controlled East Timor, that was actually listed as a potential target on several American Imperialists but it was disregarded due to the high percentage of Catholics.

If those claims didn't diminish as much US could declare war on Portugal along with Spain.
 
Portugal controlled East Timor, that was actually listed as a potential target on several American Imperialists but it was disregarded due to the high percentage of Catholics.

If those claims didn't diminish as much US could declare war on Portugal along with Spain.

That's something I've never heard. I would be interested in seeing any source where the Americans claimed Portuguese Timor...also it had far fewer Catholics than Puerto Rico, Cuba or the Philippines. Most of the population of the island was animist well into the 20th century. Keep in mind that were only perhaps 250,000 inhabitants in Portuguese Timor around 1900.
 
America more strongly aligns with France during the Napoleonic Wars. An earlier *War of 1812 leads Portugal join in on the side of the UK, seeing it as part of the broader Napoleonic Wars.
 
Portugal becomes fascist on 1930's and during WW2 Portugal attacks against American ships and USA declares war.
 
Portuguese American War alternatives

Besides the examples above, could Portugal get involved on the side of the British during the American Revolutionary or 1812 Wars or the Confederates during the Civil War [with British support]?
How about a Portugal on the side of the Central Powers?
And during the Cold War, a Portugal that goes totally communist and declares its support for the Soviet Union blatantly after 1975 followed by a large scale WW3 does the solution.
 
Besides the examples above, could Portugal get involved on the side of the British during the American Revolutionary or 1812 Wars or the Confederates during the Civil War [with British support]?
How about a Portugal on the side of the Central Powers?
And during the Cold War, a Portugal that goes totally communist and declares its support for the Soviet Union blatantly after 1975 followed by a large scale WW3 does the solution.

1) The Portuguese were a bit too distant to genuinely get involved in any of the early wars against the US, so both the Revolutionary War and 1812 are out of the picture. Also during 1812 Portugal had bigger problems (namely the metropole being under French occupation). For the Civil War you'd first need to get London to support the CSA, which is harder than a lot of people on here believe, so that is unlikely as well.

2) Portugal as part of the CP... Nope. While relations with the British went a bit sour after London denied Lisbon the so-called "Pink Map", its relations with Germany weren't rosy either, primarily due to the fact that Portugal felt threatened by the Germans (rightfully so, considering the partition proposals...).

3) A Cold War scenario is the most plausible one but most likely it'd be a proxy war with a or multiple pro-US governments fighting the "legitimate" Socialist government. But I think that's too late for OP, so let's disregard that idea :p
 
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