After Italy's postwar territorial demands were rejected by the other Allies, Prime Minister Orlando and the Italian delegation walked out of the peace conference.
The standoff between the Turks and what remained of the Allies (Greece, backed up by Britain) leads to war.
As the USA, Italy, and France lose interest in the region, Britain fights to enforce the Treaty of Sèvres, relying on the Greek Army to provide the military might. Meanwhile, the political situation in Greece changes.
As Allied troops took up positions in Turkey, the Allies and the Ottoman government signed the Treaty of Sèvres, which imposed a harsh set of conditions. But nationalist Turks in the interior of Anatolia were not ready to give up the struggle.