[11] Over August 1949 - January 1951, Raina served as Indian Army Liaison Officer at the School of Infantry in Warminster, UK.

[13] On 5 January 1965, Lieutenant-Colonel Raina was appointed Brigadier General Staff (BGS) of the XXXIII Corps in West Bengal.

[15] On 7 October 1971, Raina was appointed GOC of II Corps in the Khulna sector, with the acting rank of Lieutenant General.

[16] He raised the Corps in Krishnanagar and commanded it during operations in the Eastern Theatre of the Indo-Pakistani war of 1971, where it captured the important towns of Khulna, Jessore, Jhenida, Magura and Faridpur and also the area between the rivers Ganges and Padma.

During his tenure as the COAS, the central government led by Indira Gandhi declared a state of national emergency in India.

[13][19] Following his funeral and cremation with full military honours in Delhi on 25 May,[19] his son-in-law, together with his nephew, Squadron Leader K. K. Zalpuri, immersed his ashes in the Ganges at Haridwar on 27 May.

Jyoti Narain, who followed his father into the Army and joined his old regiment, was killed in a motorcycle accident in March 1974.