Meanwhile, the other wing was sent to serve in the Persian Gulf from 21 September 1916, being split up in detachments between Jask, Chabahar, Bandar Abbas, Henjam, Kishm Island, Lingeh and Bahrain, all port towns on the Gulf of Oman relieving the 94th Infantry detachments previously stationed there until they were relieved by the 3rd Brahmins from 16 July 1917.

They were joined by the other wing of the regiment and were sent to serve in Mesopotamia, where they were successively stationed at Basra, Tanoomah, and Nar Oomah from 24 July 1917 to 3 May 1919.

[1] From here they were sent join the forces in North Persia from 4 May 1919 at Hamadan and Kasvin in 1919, where misfortune in the shape of an epidemic of influenza overtook it, the casualties during the period, 15 December 1919, to 30 March, being no less than 57.

They arrived back from foreign service into another inflamed situation at home - the Moplah rebellion.

During the operations that followed, from their base at Cannanore the 83rd carried out for the protection duties in the northern portion of Malabar, where outbreaks occasionally threatened.