The Syria-Lebanon-Palestine boundary was a product of the post-World War I Anglo-French partition of Ottoman Syria. British forces had advanced to a position at Tel Hazor against Turkish troops in 1918 and wished to incorporate all the sources of the River Jordan within British-controlled Palestine. Following the Paris Peace Conference of 1919, and the unratified and later annulled Treaty of Sèvres, stemming from the San Remo conference, the 1920 boundary extended the British-controlled area to north of the Sykes-Picot line, a straight line between the midpoint of the Sea of Galilee and Nahariya. The international boundary between Palestine and Lebanon was finally agreed upon by Great Britain and France in 1923, in conjunction with the Treaty of Lausanne, after Britain had been given a League of Nations mandate for Palestine in 1922.