The invasion of Corsica was a campaign fought in the spring and summer of 1794 by combined British military and Corsican irregular forces against a French garrison, early in the French Revolutionary Wars. The campaign centred on sieges of three principal towns in Northern Corsica; San Fiorenzo, Bastia and Calvi, which were in turn surrounded, besieged and bombarded until by August 1794 French forces had been driven from the island entirely.