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.
Following the Paris Peace Conference of 1919 and the failed Treaty of Sèvres, which stemmed from the San Remo conference, the 1920 boundary extended British control northwards along the Sykes-Picot line, a straight line between the midpoint of the Sea of Galilee and Nahariya. The final agreement on the international border between Palestine and Lebanon was reached in 1923 with the Treaty of Lausanne, after Britain received a League of Nations mandate for Palestine in 1922.