More than a year after the agreement with Russia, British and French representatives, Sir Mark Sykes and François Georges Picot, drafted another secret agreement on the future prey of the Great War. Picot represented a small group determined to ensure control of Syria for France; For his part, Sykes asked the UK to compensate for the influence in the region. The agreement did not allow, to a large extent, the future growth of Arab nationalism, which the British government and army wanted to use at the same time for their advantage vis-à-vis the Turks. The Arabs regarded McMahon`s promise as a formal agreement that could have been. Among the borders proposed by Hussein was Palestine. But this area was not explicitly mentioned in the McMahon-Hussein correspondence. The agreement thus helped to frame the contours of modern nation-states in a region where there were none before. Since it is essentially an agreement between two colonialist powers outside the region, it would have devastating effects. In the Constantinople Agreement of 18 March 1915, after naval operations began in the run-up to the Gallipoli campaign, Russian Foreign Minister Sergei Sazonov wrote to the French and British ambassadors to claim Constantinople and the Dardanelles. During a five-week series of diplomatic talks, the United Kingdom and France, although they made their own claims, agreed on greater influence in Iran in the case of the United Kingdom and on the annexation of Syria (including Palestine) and Cilicia for France.
The demands of the United Kingdom and France were unanimous and all parties agreed to leave the exact management of the holy sites to a subsequent settlement.  Without the Russian revolutions of 1917, Constantinople and the Strait could have been given after the Allied victory over Russia. This agreement and the Sykes-Picot agreement were complementary, because France and Great Britain had to satisfy Russia first to conclude the partition of the Middle East.  Western commentators and elsewhere use the agreement to explain the current unrest in the Arab world. For them, it is a “blowback” – the unintended and damaging effects of imperialist interference in the region.