The Indian Army had no standby force ready in 1971 with the specific task of attacking East Pakistan, one of the many reasons why India did not immediately intervene after Pakistan launched Operation Searchlight in March 1971. Indian Army's Eastern Command was tasked with defending the northern and eastern borders and fighting the insurgencies in Nagaland, Mizoram and Naxalites in West Bengal at that time. [1]
Mukti Bahini, aided by the Indian army through Operation Jackpot, led the struggle against the Pakistan Army while the Indian Army readied for intervention. General M. A. G. Osmani, Commander-in-Chief Bangladesh Forces, had divided Mukti Bahini forces into 11 geographical sectors for command and control purpose. Mukti Bahini forces numbered 30,000 regular soldiers (including 3 brigades containing 8 infantry battalions and 3 artillery batteries) and at least 100,000 guerrillas by December 1971.
The Indian Army Eastern Command assembled two existing infantry corps, the IV Corps and the XXXIII Corps, for operations in Bangladesh, and created a new corps (II Corps) [2] besides reorganising the 101 Communication Zone as a combat formation. [3] On 21 November 1971, the Indian and Bangladesh forces were put under a joint command structure India Bangladesh force in the eastern theatre, led by Lieutenant General Jagjit Singh Aurora, and this force came to be known as Mitro Bahini. In addition to 29 battalions of the Border Security Force (BSF), [4] Mukti Bahini guerrillas operating near the border or awaiting deployment in camps inside India were organised into infantry companies and attached to various Indian formations.
HQ: Fort William, Kolkata
GOC-in-C (Indian Army): Lieutenant General Jagjit Singh Aurora
COS: Major General JFR Jacob
Director Military Operations: Major General Inderjit Singh Gill, MC
Director Operation Jackpot: Lieutenant General B.N. 'Jimmy' Sirkar
Bangladesh Forces Liaison: Group Captain A.K. Khandkar,
HQ: 8, Theater Road, Kolkata
Units attached to Eastern Command but outside Bangladesh operational area:
From IV Corps:
From XXXIII Corps:
Airborne forces attached to Eastern Command:
Eastern Command Reserve:
GOC: Major General J.P. Chowdhury HQ: Kolkata
Area of Operation: Khulna, Jessore, Kushtia and Faridpur districts
GOC: Lieutenant General T.N. 'Tappy' Raina
HQ: Krishnanagar, West Bengal
GOC: Major General Dalbir Singh
GOC: Major General M.S. Barar
HQ: Krishnanagar
Area of Operation: Rajshahi, Bogra, Dinajpur and Rangpur districts
GOC: Lieutenant General M. L. Thapan
HQ: Siliguri, West Bengal
GOC: Maj. Gen. Lachman Singh
HQ: Balurghat, West Bengal
(Eastern Command HQ Reserve) GOC: Major General P. C. Reddy
HQ: Cooch Bihar, West Bengal
Area of Operation: Mymensingh and Tangail districts
GOC: Major General Gurbax Singh Gil
HQ: Guwahati, Assam
Area of Operation: Sylhet, Comilla, Noakhali & Chittagong districts
GOC Lieutenant General Sagat Singh
HQ: Agartala, Tripura
GOC: Major General K. V. Krishna Rao
GOC: Major General B.F. Gonsalves
GOC: Major General R.D. Hira
FOC-in-C: Vice Admiral Nilakanta Krishnan
HQ: Vishakhapatnam, Andhra Pradesh
FOCEF: Rear Admiral S. H. Sarma
A liaison officer from the Navy was posted at Fort William to coordinate matters with the Army Eastern Command. The fleet was at its peacetime standing when radio intercepts warned of PNS Ghazi entering the Bay of Bengal. INS Vikrant and part of the Eastern Fleet was moved to the Andamans as a result.
Two gunboats under Indian officers and crewed by Bengali seamen were engaged in Operation Hotpants prior to 3 December 1971, harassing merchant traffic to East Pakistan and laying mines on the waterways. After 6 December, when the Indian government recognised Bangladesh as a sovereign nation, the crew wore uniforms of their respective organisations.
Squadron CO: Commander M.N.R. Samant (On deputation from Indian Navy)
AOC-in-C: Air Marshal H. C. Dewan, Temporary advanced HQ at Fort William
Prior to 1971, Indian Air Force had two command centers dealing with the East, Eastern Air Command (HQ Shillong) responsible for the North Eastern Border, and the Central Air Command (HQ Allahabad), looking after areas south of the Ganges river. Air Chief Marshal Pratap Chandra Lal formed an advance HQ at Fort William after consultation with Major General Jacob to coordinate operations with the army before the start of the war.
Western Sector:
North East and North Western Sector: AOC-in-C: Air Vice Marshal Devasher HQ: Shillong
CO: Flight Lieutenant Sultan Mahmud HQ: Dimapur, Nagaland, then Agartala
This unit was formed by Bengali pilots and technicians defecting from the Pakistan Air Force. Flying light aircraft donated by India, they launched attacks on depots and communication lines on 2 December 1971, before the start of the war. The unit relocated to Agartala and then Shamshernagar after 3 December 1971.
A brigade is a major tactical military formation that typically comprises three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute a division.
The 4th Infantry Division, also known as the Red Eagle Division, is an infantry division of the Indian Army. This division of the British Indian Army was formed in Egypt in 1939 during the Second World War. During the Second World War, it took part in campaigns in East Africa, Syria, North Africa and Italy. Post independence, the division is part of the I Corps and headquartered at Prayagraj.
The XXXIII Corps, or the Trishakti Corps, is a corps of the Indian Army. It draws some of its heritage from the British Indian XXXIII Corps which was formed in 1942, but disbanded in 1945. It was re-raised in 1960 at Shillong.
The 1st Armoured Division is an armoured division of the Indian Army, headquartered at Patiala, Punjab. It is part of II Corps of the Indian Army's Western Command.
The First and SecondBattles of Hilli were two major battles fought during the Bangladesh Liberation War on 22–24 November and 10–11 December 1971. They are generally regarded as the bloodiest battles of the eastern front of the Indo-Pakistani War of 1971. The first battle saw, according to veterans of the battle, the fiercest fighting of the war, but the second was much tamer.
Mohammad Ataul Gani Osmani was a Bangladeshi military officer and revolutionary. His military career spanned three decades, beginning with his service in the British Indian Army in 1939. He fought in the Burma Campaign during World War II, and after the partition of India in 1947, he joined the Pakistan Army and served in the East Bengal Regiment, retiring as a colonel in 1967. Osmani joined the Provisional Government of Bangladesh in 1971 as the commander-in-chief of the nascent Bangladesh Forces. Regarded as the founder of the Bangladesh Armed Forces, Osmani retired as the first full general from the Bangladesh Army in 1972.
The 8th Mountain Division is a division of the present-day Indian Army that specialises in mountain warfare.
The Battle of Dhalai was fought between India and Pakistan before the formal start 1971 India-Pakistan War for the liberation of Bangladesh. The battle started after an attack by Indian Army on Pakistani border outpost (BOP) in East Pakistan on 28 October and lasted until 3 November 1971. Three infantry battalions belonging to 61 Mountain Brigade, one battalion belonging to East Bengal Regiment and 7 Rajputana Rifles supported by an artillery-sized brigade of Indian army fought against a battalion-sized 12 Frontier Force of Pakistan army.
East Pakistan Air Operations covers the activity of the Pakistan Air Force (PAF) and Pakistan Army Aviation units in former East Pakistan during the Bangladesh Liberation War. The operations involved the interdiction, air defense, ground support, and logistics missions flown by the Bangladesh Air Force, Indian Air Force, and the Indian Navy Aviation wing in support of the Mukti Bahini and later Indian Army in Bengal.
Lieutenant General Sagat Singh, PVSM was a General Officer in the Indian Army, notable for his participation in the liberation of Goa and later in Indo-Pakistani war of 1971. He held many commands and staff appointments throughout his career.
The Order of battle of the East African campaign shows the ground forces of both sides in East Africa on the date that the Italians declared war on Britain and France, 10 June 1940 and for the British and Commonwealth forces involved in the 1941 offensive.
The Pakistani plan for a military action which commenced on 25 March 1971, in the then East Pakistan was code-named Operation Searchlight. This is the Operation Searchlight order of battle which was outlined on 19 March 1971, by Major General Khadim Hussain Raja, GOC 14th infantry division, and Major General Rao Farman Ali in the GHQ of Pakistan Army in Dhaka, (then) East Pakistan.
On 25 March 1971, the Pakistani military, supported by paramilitary units, launched the military operation to pacify the insurgent-held areas of East Pakistan, which led to a prolonged conflict with the Bengali Mukti Bahini. Although conventional in nature during March–May 1971, it soon turned into a guerrilla insurgency from June of that year. Indian Army had not directly supported the Bengali resistance but had launched Operation Jackpot to support the insurgency from May 1971.
The Eastern Command of the Pakistan Army was a corps-sized military formation headed by a lieutenant-general, who was designated the Commander Eastern Command. After the partition of India by United Kingdom, the Islamic Republic of Pakistan was divided into two territories separated by 1,000 miles (1,600 km). Most of the assets of the Pakistan armed forces were stationed in West Pakistan; the role of the Pakistan armed forces in East Pakistan was to hold that part of the country until the Pakistani forces defeated India in the west. The Pakistan Army created the Eastern Command, with one commander in the rank of Lieutenant General responsible for the command. The armed forces, had drawn up a plan to defend Dhaka by concentrating all their forces along the Dhaka Bowl.
Prior to Bangladesh Liberation War in 1971, India had no plans for large scale military action in East Pakistan. Since the Sino-Indian War of 1962, the primary objective of the Indian Army Eastern Command was the defence of the Indian northern and eastern borders, defending the "Shiliguri Corridor", and on combating insurgencies raging in Mizoram, Nagaland, Manipur and the Naxalites in West Bengal.
The Eastern Command is one of the six operational commands of the Indian Army. It is headquartered in Fort William in the city of Kolkata in the state of West Bengal. The Eastern Command was formed on 1 November 1920. The Command is commanded by a three-star rank officer with the title General Officer Commanding-in-Chief (GOC-in-C).
The Desert Column was a First World War British Empire army corps which operated in the Sinai and Palestine Campaign from 22 December 1916. The Column was commanded by Lieutenant General Philip W. Chetwode and formed part of Eastern Force. When Chetwode took command of Eastern Force after the Second Battle of Gaza, Harry Chauvel took command and oversaw the expansion of the column to three divisions.
Z Force, also known as the Tura Brigade, was the first military brigade of Bangladesh Forces, formed during the Liberation War of Bangladesh in 1971 under Major Ziaur Rahman along with the consent of the revolutionary government of Bangladesh in exile. The brigade was formed with the 1st, 3rd and 8th Battalion of East Bengal Regiment on 7 July 1971. It is the first ever complete brigade formed during the Liberation War of Bangladesh in 1971.
The Structure of the Egyptian Expeditionary Force over the course of the First World War is shown below.
192 Field Regiment is part of the Regiment of Artillery of the Indian Army and consists of 1921, 1922 and 1923 field batteries.