...declaring himself "King of the Arabs" on…

...declaring himself "King of the Arabs" on October 2, Hussein performs the ceremony of the bai'a, the traditional Arab custom in which the investiture is accompanied by a formal declaration of allegiance, although the Allies recognize him only as king of the Hijaz, a tide rejected by most peninsular Arabs.
 
Britain provides supplies and money for the Arab forces led by Abdullah and Faisal.

British military advisers also are detailed from Cairo to assist the Arab army that the brothers are organizing.

Of these advisers, T.E. Lawrence (Lawrence of Arabia) is to become the best known.