sentences:  This Constitution would also serve as the legal basis for the Turkish War of Independence during 1919-1923, since it would refute the principles of the Treaty of Sèvres of 1918 signed by the Ottoman Empire, by which a great majority of the Empire's territory would have to be ceded to the Entente powers that had won the First World War.The National Assembly commenced the debates for a new constitution on November 19, 1920 and it was ratified during the session of January 20, 1921.It was the first Turkish Constitution that consecrated the principle of national sovereignty.