Fallahi served as commander ground forces. Until June 1980 he was the deputy commander of joint staff. He was appointed by Abolhassan Bani Sadr as joint chief of staff in June 1980.On 29 September 1981, he died along with several other top commanders, including General Javad Fakouri (Air Force Commander), General Yousef Kolahdouz (Acting Commander of the Revolutionary Guards), Colonel Sayyid Mousa Namjoo (Defence Minister) and Commander Jahanara in a plane crash that was due to land in capital after take off from Ahvaz.