The Hejaz administration in 1845, was taken over directly by Constantinople, and it was constituted a vilayet under a vali or governor general.
Right - The keffiyeh, held in place by a rope circlet, called an agal, was worn generally throughout the Ottoman empire, and into the WW1 period pictures. In the case of the troops from the Hajaz Corps, the keffiyeh, was distinctive.
In the WW1 period, generally, a wide selection of white, black keffiyeh were worn, and photographs show many traditional Yemeni designs and colours used as well.
Right - The 1882 Hamidiye (SultanAbdul Hamid II) cast brass coat of arms badge (7 x 5.8 cm). Worn by the Hejaz Division on the agal (keffiyeh head-cords).
Most photographs of the Hajaz corps mounted companies show them armed with the traditional Arab Hunting Spear: Az-Zagayah.