The Quasi-War (1798-1800) or 'Half War' was a limited, undeclared naval conflict fought between the United States and the First French Republic. Hostilities arose when French privateers began attacking neutral American shipping, resulting in several minor naval skirmishes before the conflict was de-escalated in September 1800. The war led to the strengthening of the US Navy.
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Definition
Timeline
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Oct 1797 - Apr 1798The XYZ Affair; French diplomats demand bribes from American commissioners as a prerequisite for negotiations, increasing tensions between France and the US.
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7 Jul 1798 - 30 Sep 1800The Quasi-War, an undeclared naval conflict, is fought between Revolutionary France and the United States.