The three French departments of Greece (French: Départements français de Grèce) were created under the First French Republic in 1797 with the annexation of the Ionian Islands (until then possessed by the Republic of Venice) after the signing of the Treaty of Campo Formio by Napoleon Bonaparte.
The departments were:
They came under Russian/Ottoman rule between October 1798 (Zante and Ithaca) and March 1799, after the Ottoman Empire allied with Russia, sending a joint fleet led by admiral Fyodor Ushakov against the French. The campaign culminated in the four-month siege of Corfu (1798–1799). They were later reorganised into the Septinsular Republic, the first even partially self-governing Greek state since the fall of the last successor states of the Byzantine Empire.
Very short-lived, this was the first French experiment in creating Overseas departments, treated as sovereign French territory despite having no territorial continuity with the main French territory.