The 21st Indian Infantry Division was a division of the Indian Army during World War II. It was formed in April 1944. in Assam. It never saw any combat and its only sub unit was the 268th Indian Infantry Brigade. The division was disbanded and its units transferred to become the 44th Airborne Division in June 1944. The division was reformed within the Indian Army after the Partition of India and is now part of IV Corps. It was raised in 1963 and assigned to Arunachal Pradesh west of 5 Mountain Division.