Negotiations to end the Balkan war started in December 1912 in London and the issue of the Aegean islands was one persistent problem. The issue divided the great powers with Germany, Austria-Hungary, and Italy supporting the Ottoman position for return of all the Aegean islands and Britain and France supporting the Greek position for Greek control of all the Aegean islands. With Italy controlling key islands in the region, major power negotiations deadlocked in London and later in Bucharest. Romania threatened military action with the Greeks against the Ottomans in order to force negotiations in Athens in November 1913. Eventually, Greece and Great Britain pressured the Germans to support an agreement where the Ottomans would retain Tenedos, Kastelorizo and Imbros and the Greeks would control the other Aegean islands. The Greeks accepted the plan while the Ottoman Empire rejected the ceding of the other Aegean islands. This agreement would not hold, but the outbreak of World War I and the Turkish War of Independence put the issue to the side.