While the Treaty of Sèvres was still under discussion, the Turkish national movement under Mustafa Kemal Pasha split with the monarchy, based in Constantinople, and set up a Turkish Grand National Assembly in Ankara in April 1920. He demanded for the Turks to fight against the Greeks, who were trying to take the land that had been held by the Ottoman Empire and given to Greece in the treaty. That started the Greco-Turkish War (1919–1922), which resulted in a Turkish victory.