USA in the French Revolutionary Wars

What would the effects of a U.S entry into the French Revolutionary wars be?

The Americans take the side of the revolutionary's, and if like OTL Napoleon still happens the effects of America siding with him during his wars, as opposed to OTL where they used the war for a basis to launch the war of 1812.
 
Why and how would the USA enter the French revolution, let alone against the same government that had helped them become independent a few years earlier?
 
Relationship between the US and the early Revolutionary governments of France were occasionally very cold (Quasi-War etc.).
Not there aren't ways to entangle the US in the wider European conflict at earlier dates in many forms, for example through events in Haiti.
 
The war of 1812 effectively was the US entering the war.

This. The USA declared war against the United Kingdom, thus being de facto allied to Napoleon. It didn't change history very much (except in the development of Canadian nationalism); there were a few battles that went each way, and then both sides decided not to bother fighting any more and gave up without changing anything. (Except for the UK betraying its Native American allies as soon as it was convenient to do so, but that was nothing new either.)

If you mean the USA intervening directly in the French Revolutionary Wars, which took place in Europe… no. Even if the USA had the inclination to intervene, it couldn't project any noticeable amount of power in Europe.

{edit} And even in North America, if either France or Britain hadn't been distracted by constant wars against the other, either of them had the power to crush the United States like a bug underfoot. One mustn't confuse the USA of the 1860s with the USA of the 1810s; the former could have been reasonably significant on the world scale had it chosen to be, whereas the latter could not.
 
To start, you'd need better American-French relations in the 1790's.
And if the US is supporting the republic, it would probably be against the empire.
 
To start, you'd need better American-French relations in the 1790's.

The United States of America won independence because the Kingdom of France supported the American colonists against Great Britain. For the socially conservative, anti-government United States to be happy with a radical, authoritarian state that overthrew the Kingdom of France and is busy committing atrocities that are muddying the reputation of republicanism would be… challenging, Thomas Jefferson's fantasies aside.

And if the US is supporting the republic, it would probably be against the empire.

There is no such thing as supporting the French First Republic against the First Empire. There was no point in time in which both of them existed. The Republic transformed into the Empire by popular vote. The events of the French Revolution might have been influenced by the ideas of the American Revolution, but the Americans themselves were at the time such an insignificant power (and on the wrong side of the Atlantic, too) that they were utterly incapable of changing the tide of events in France.
 
There is no such thing as supporting the French First Republic against the First Empire. There was no point in time in which both of them existed. The Republic transformed into the Empire by popular vote. The events of the French Revolution might have been influenced by the ideas of the American Revolution, but the Americans themselves were at the time such an insignificant power (and on the wrong side of the Atlantic, too) that they were utterly incapable of changing the tide of events in France.

I think he meant to say that the US would be against the act of Napoleon declaring himself Emperor and establishing the French Empire, regardless of whether they could do anything about it.
 
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