On the basis of McMahon's assurances the Arab Revolt began on 5 June 1916. However, the British and French also secretly concluded the Sykes–Picot Agreement on 16 May 1916. This agreement divided many Arab territories into British- and French-administered areas and allowed for the internationalisation of Palestine. Hussein learned of the agreement when it was leaked by the new Russian government in December 1917, but was satisfied by two disingenuous telegrams from Sir Reginald Wingate, High Commissioner of Egypt, assuring him that the British government's commitments to the Arabs were still valid and that the Sykes-Picot Agreement was not a formal treaty.