The Siege of Calvi is a combined British and Corsican military operation during the Invasion of Corsica in the early stages of the French Revolutionary Wars.

The Corsican people had risen up against the French garrison of the island in 1793, and sought support from the British Royal Navy's Mediterranean Fleet under Lord Hood.

Hood's fleet had been delayed by the Siege of Toulon, but in February 1794 supplied a small expeditionary force which successfully defeated the French garrison of San Fiorenzo, then a larger force that besieged the town of Bastia.

The British force, now led by General Charles Stuart, turn their attention to the fortress of Calvi, the only remaining French-held fortress in Corsica.

Calvi is a heavily fortified position, defended by two large modern artillery forts.

Stuart therefore prepares for a long siege, seizing the mountainous heights over the approaches to the town and opening a steady fire, which is vigorously returned.

Both sides take casualties; among the British wounded is Captain Horatio Nelson, who had been blinded in one eye.

After several weeks the French positions are sufficiently damaged and Stuart launches a major assault, driving the French out of the forts in turn and into the town.

Stuart and the French commander Raphaël de Casabianca now engage in extended negotiations that lead to first a truce, then, on 10 August, a capitulation.

The terms of the surrender are generous, and the French troops repatriate to France.

With the conclusion of the siege, the island of Corsica now becomes a British colony, and will remain a British base of operations for two years.