The new flare-up of combat in the Balkans spread the war to Greece. British and French forces had entered Greece in late 1915 in a futile effort to aid Serbia. A large contingent of their troops remained in the port of Salonika, on Greek territory, but without the consent of the Greek government. In 1916 the political establishment in Greece split: supporters of King Constantine clung to a neutrality colored by sympathy for the Central Powers. Meanwhile, former prime minister Eleutherios Venizelos and his faction favored fighting on the Allied side. Territory under the control of Venizelos joined the Allies in November while the country as a whole seemed to slide toward civil war.