Gen. Rao was commissioned into the Indian Army in 1942. During the 1971 war, his division, the 8 Mountain Division, captured the Sylhet area and liberated north-east Bangladesh. He was the Chief of the Army Staff in 1983 and was appointed Governor of Nagaland, Manipur and Tripura in June 1984. He was Governor of Jammu and Kashmir for the first time from 11 July 1989 to 19 January 1990 and the second time from 13 March 1993 till 2 May 1998.