Venetian rule in the Ionian Islands 1809, Great Britain took possession of all the islands with the exception of Corfu and Paxos, which was only surrendered in 1814. In 1815, the Ionian Islands became a British protectorate under the name United States of the Ionian Islands. The civil and military governor of the Ionian Islands was the "Provveditore generale da Mar", who lived on Corfu and had the supreme peacetime command of the Venetian navy. In wartime, due to his absence at the head of the fleet, he was sometimes replaced by a "Provveditore generale delle Tre Isole" ("Superintendent general of the Three Islands"), referring to
United States of the Ionian Islands and Russia signed the Treaty of London, pledging the transfer of sovereignty to Greece upon ratification; this was meant to bolster the reign of the newly installed King George I of Greece. Thus, on 28 May, by proclamation of the Lord High Commissioner, the Ionian Islands were united with Greece. According to the second constitution of the republic (1803), Greek was the primary official language, in contrast to the situation in the Septinsular Republic. Italian was still in use, though, mainly for official purposes since the Venetian Republic. The only island in which Italian (Venetian) had a wider spread was