On 10 June 1916, Sherif Hussien Bin Ali prince of Mecca, officially declared the Great Arab Revolt against the Ottoman Empire to rid Arab nations of the Turkish rule that had lasted about four centuries.
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.
Roles of Military Formations in Jordan from the Foundation of the Emirate until the 1948 Arab–Israeli War:
This army started with an infantry company, cavalry company, machine guns unit, signal section and military band. In 1923, the total strength of the army, which was under the command of British Captain Frederick Gerard Peake, did not exceed 750 men.