The 1st Mountain Cavalry Division was formed originally as the "1st Mountain Cavalry Division" in July 1941 and immediately assigned to the 45th Army on the Iranian Border. In August of the same year the division was assigned to the 47th Army and in October as part of the Soviet Occupation Forces in Persia. In December it was re-designated to the "1st Cavalry Division" and was assigned to the 15th Cavalry Corps. It is unknown what happened after December 1942 but most sources show it being disbanded and units dispersed into Iran.