The Greek quest began with the acquisition of Thessaly through the Convention of Constantinople in 1881, a failed war against Turkey in 1897 and the Balkan Wars (Macedonia, Epirus, some Aegean Islands). After World War I, Greece acquired Western Thrace from Bulgaria as per the Treaty of Neuilly-sur-Seine, but also Ionia/Smyrna and Eastern Thrace (excluding Constantinople) from the Ottoman Empire as ordained in the Treaty of Sèvres. Subsequently, Greece launched an unsuccessful campaign to further their gains in Asia Minor, but were halted by the Turkish revolution. The events culminated into the Great Fire of Smyrna, Population exchange between Greece and Turkey, and Treaty of Lausanne (1923) which returned Eastern Thrace and Ionia to the newfound Turkish Republic. The events are known as the "Asia Minor Catastrophe" to Greeks. The Ionian Islands were ceded by Britain in 1864, and the Dodecanese by Italy in 1947.