GREECE. Shows United States of the Ionian Islands (pink) TALLIS/RAPKIN 1851 map'Greece' The map shows Greece, with the Ionian Islands coloured in red. The United States of the Ionian Islands (Greek: ) was a state and amical protectorate of the United Kingdom between 1815 and 1864. It was the successor state of the Septinsular Republic. It covered the territory of the Ionian Islands, located in modern Greece, to whom it was ceded as a gift of the United Kingdom to the newly enthroned King George I, at the end of the protectorate.