The 21st Indian Infantry Division was a division of the Indian Army during World War II. It was formed in April 1944. in Assam

Assam

Assam , also, rarely, Assam Valley and formerly the Assam Province , is a northeastern state of India and is one of the most culturally and geographically distinct regions of the country...

. 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

44th Airborne Division (India)

The Indian 44th Airborne Division was a formation of the Indian Army during World War II, created in 1944. It provided a parachute battalion for one minor airborne operation but the war ended before the complete formation could take part...

 in June 1944.

On formation, 268th Indian Infantry Brigade

268th Indian Infantry Brigade

The 268th Indian Infantry Brigade was an Infantry formation of the Indian Army during World War II. It was formed in October 1942, by the re designation of 268th Indian Armoured Brigade. It was assigned to the 43rd Indian Armoured Division until March 1943. Then the 44th Indian Armoured Division...

, converted from 268th Indian Armoured Brigade in August 1942, consisted of 17/7th Rajput Regiment

7th Rajput Regiment

The 7th Rajput Regiment was an infantry regiment of the British Indian Army. It was formed in 1922, after the Indian government decided to reform the army moving away from single battalion regiments to multi battalion regiments...

, 2/4th Bombay Grenadiers

4th Bombay Grenadiers

The 4th Bombay Grenadiers were an infantry regiment of the pre-independence Indian Army, formed on 1 March 1922 as part of the reforms of the Indian Army that took place after the end of the First World War. Following this, the Regiment spent the next fifteen years serving in British Somaliland in...

, 5/4th Bombay Grenadiers, 2nd Battalion, The King's Own Scottish Borderers, 2nd Battalion, The South Lancashire Regiment, 429th Field Company Indian Engineers, and 45 Cavalry

45 Cavalry

The 45th Cavalry Regiment is an Indian Army armoured unit. It was first created during World War II and was active from 1941 to 1946. It was reformed in 1965 and is currently stationed in Pathankot India...

.

The division was reformed within the Indian Army

Indian Army

The Indian Army is the land based branch and the largest component of the Indian Armed Forces. With about 1,100,000 soldiers in active service and about 1,150,000 reserve troops, the Indian Army is the world's largest standing volunteer army...

 after the Partition of India

Partition of India

The Partition of India was the partition of British India on the basis of religious demographics that led to the creation of the sovereign states of the Dominion of Pakistan and the Union of India on 14 and 15...

 and is now part of IV Corps

IV Corps (India)

-The IV Corps in the India Pakistan War 1971:"Under the command of Lieutenant General Sagat Singh the IV Corps, with all eight East Bengal Regiment battalions, had already made some gains before the war. An enclave south of Akaura served as a springboard for 57 Division, which advanced along the...

. It was raised in 1963 and assigned to Arunachal Pradesh

Arunachal Pradesh

Arunachal Pradesh is a state of India, located in the far northeast. It borders the states of Assam and Nagaland to the south, and shares international borders with Burma in the east, Bhutan in the west, and the People's Republic of China in the north. The majority of the territory is claimed by...

west of 5 Mountain Division.