The Sharifian Army consisted of about 5,000 regular forces and many thousands of irregular forces.[8] Many of the regular forces were former Arab members of the Ottoman military who defected and joined the Arab Revolt. Irregular forces refer to largely untrained Arabs who joined the revolt for a short period of time when the fighting was taking place near their home. As the fighting stretched further from Mecca, many soldiers from around Mecca decided that they had done their part and returned home.