Reza Shah’s death.

By 1915 he was promoted to the rank of Colonel.[17] His record of military service eventually led him to a commission as a Brigadier General in the Persian Cossack Brigade. He was the last commanding officer of the Brigade, and the only Iranian commander in its history, succeeding to this position the Russian colonel Vsevolod Starosselsky, whom Reza Shah had helped, in 1918, take over the brigade.