On 21 November 1920, Prince Abdullah Bin Al-Hussien (later King) arrived at Ma'an, where he expressed his resolution to drive out the Turkish forces from Syria. Later, on 5 December 1920, he proclaimed himself as deputy king in Syria and appealed to members of the Al-Faissali army to join his forces in Ma'an. His calls received much attention in the Arab world as several prominent Arab nationalists and other Arab princes joined his campaign; these later formed the embryonic force of the Arab legion.