アラブ連合
In 1918, after serving for one year as mayor of Jerusalem, al-Dajani joined the Administrative Committee of the Muslim-Christian Association (MCA) and went on to become Jerusalem and then regional president of the organization. The Jerusalem Congress convened January 27 – February 10, 1919, under the leadership of Aref al-Dajani and Izzat Darwazah. The resolution reached at this forum was cabled to the Paris Peace Conference on behalf of the Arabs of Palestine, demanding a renunciation of the Balfour Declaration and the inclusion of Palestine as "an integral part of...the independent Arab Government of Syria within an Arab Union, free of any foreign influence or protection."