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Before America became a country, we fought in the French and Indian War. But, the first war we fought as a country was the American Revolutionary War.
It was not a specific country more like a region but the war was the Gulf War.
The first Iraq War was fought to drive Iraq out of Kuwait. - And BTW - a few Allies helped. It was not entirely a "US war"
A provocation to start a war, as Mexico had already warned the US that annexation would mean war (it did; and Mexico lost).
Spain and the US fought the War, but not on their home turf.
Albania.
the Philippinesthe Philippines
Before America became a country, we fought in the French and Indian War. But, the first war we fought as a country was the American Revolutionary War.
China
Vietnam
France
It was not a specific country more like a region but the war was the Gulf War.
The first Iraq War was fought to drive Iraq out of Kuwait. - And BTW - a few Allies helped. It was not entirely a "US war"
We fought the British from England.
A provocation to start a war, as Mexico had already warned the US that annexation would mean war (it did; and Mexico lost).
Spain and the US fought the War, but not on their home turf.
Italy