Tangail Airdrop
The Tangail Airdrop (11th December, 1971) was an airborne operation conducted by the Indian Army in order to seize Poongli Bridge and ferry in the Tangail area. The operation, involving 2 Para of the Indian Army's Parachute Regiment is often regarded as one of the largest - if not the largest - airborne operation following World War 2. The operation saw the capture of all objectives and the repulsion of the Pakistan Army's 93rd Infantry Brigade which was attempting to withdraw to Dhaka to bolster its defence. Objective and Preparation

Objective 
The objectives of 2 Para for the drop were simple:

 Secure Poongli Bridge over the Lohajang River
 Secure the ferry crossing point and the ferries on the East of the bridge
 Intercept and prevent the Pakistani 93rd Infantry Brigade from withdrawing across the river
 Link up with 1 Maratha Light and push towards Dhaka

Reconnaissance
The Indian Army had realised the importance of Poongli Bridge and crossing the river there early on and had recognised that for any future offensives into Bangladesh, its capture was necessary. To this end, in November 1971 Captain F. K. Ghosh of the Parachute Regiment had been infiltrated into Bangladesh and then into the Tangail area through 11 Sector. His objective had been to link up with Mukti Bahini commander Kader Siddiqui in order to locate potential drop zones. It was the intelligence gathered by Captain Ghosh that allowed the Indian Army to develop the plan required to capture the bridge and secure the advance towards Dhaka. Orders of Battle

Indian Army 
Though the entire 95th Mountain Brigade was advancing down towards Tangail, the battle would only be fought by the following:

 2nd Battalion, Parachute Regiment (detached from F-J Sector Force, an ad hoc brigade size formation)
 1st Battalion, Maratha Light Infantry

Pakistani Army 
The 93rd Infantry Brigade, that had fought the advance of the 95th every step of the way, was also an ad hoc force. However, they were severely understrength at the time of the Tangail battle. The order of battle was thus:

 33 Punjab
 Understrength by 1 Company at the time of battle. 31 Baluch
 Destroyed during the Battle of Jamalpur, December 10th. Survivors surrendered to Indian forces. 70 Wing Rangers (Understrength, folded into 33 Punjab)
 71 Wing Rangers (Understrength, folded into 33 Punjab)
 ~5,000 Razakars (Reduced to 600 at the time of battle, according to Pakistani sources)

The Operation: 11th/12th December, 1971

The Drop 
The operation began in the afternoon of the 11th of December. By 1650hrs, the 750 men of 2 Para along with their pack howitzers and jeeps had landed successfully north of Tangail. However, 20 men had gotten lost during the drop. 19 of them would be dropped 24 kilometers north of the DZ. The 20th man, Paratrooper Mahadeo Curao, suffered a "hang up" during the drop and had to be dropped near Sara Airfield with his secondary parachute. Despite being wounded and alone, he evaded capture and linked up with a local Mukti Bahini unit, with whom he went on numerous raids to eliminate "Razakars" before rejoining his unit on January 2nd, 1972 - a full 33 days after the end of the war. 2 Para was dropped 9 kilometers north of Tangail. Near Kalihati (a town near Tangail), Brigadier Qadir (CO of 93rd Brigade) witnessed the drop and ordered a nearby company to engage the paratroopers while they were still regrouping. However, the company did not reach in time and the paratroopers had managed to regroup and organise themselves. Realising this, Brigadier Qadir ordered his brigade to begin preparations to attack the paratroopers. By the evening, the paratroopers had crossed the 9km towards their objective - Poongli Bridge. Initial reconnaissance revealed that the bridge was lightly defended: only 2 Pakistani infantry platoons with a ragtag group of Razakars. Leaving "D" Company behind to cover their flanks, the rest of the battalion commenced their attack on the bridge. The lightly defended bridge, along with the ferry crossing point, would be overrun and captured by 2000hrs with Indian forces suffering no casualties. "D" Company now reinforced the positions at the bridge and 2 Para dug in to defend it. Pakistani Counterattacks 
Through the night of the 11th/12th and the first half of the 12th, the 93rd Brigade would launch 5 counterattacks on 2 Para. However, the 93rd's fighting ability had already been degraded greatly. On the 10th of December, the Indian 167th Mountain Brigade along with the 95th Mountain Brigade had surrounded 31 Baluch of the Pakistani 93rd in Jamalpur. Though 31 Baluch put up a fight, it had surrendered by 0730hrs. This resulted in the surrender of ~1,500 men and multiple artillery guns. The rest of the 93rd had been subjected to constant air attacks by the Indian Air Force and its professional forces had suffered a further 252 casualties (killed and captured) between the 3rd and 10th of December, during the 95th Mountain Brigade's advance. With the surrender of 31 Baluch, the only unit of the 93rd left in fighting condition was 33 Punjab which had been reinforced by the remaining companies of the Pakistan Rangers. 33 Punjab, while leaving Madhupur during their retreat to Dhaka, had left behind one of its companies to defend Madhupur. Therefore, by the time the 93rd counterattacked 2 Para's positions at Poongli, they were severely understrength and disorganised. This resulted in all 5 of their attacks being badly badly coordinated. The attacks were further hampered by the fact that the Pakistani regulars had to rely on the ill-trained Razakars to bolster their numbers during the attacks. The Razakars would make up the majority of the casualties. Airstrikes by the IAF throughout the morning and noon of the 12th of December also further degraded the 93rd's capability. By 1500hrs on the 12th, 1 Maratha Light had linked up with 2 Para at Poongli and further secured the bridge. 2 Para and 1 Maratha Light would set up ambushes for the Pakistani infantry and regularly harass their lines throughout the remainder of the 12th. By the end of the 12th, because of their badly coordinated counterattacks and the Indian forces' well conducted raids, the 93rd would cease to exist as a fighting unit, suffering over 300 casualties. By 1745hrs on the 12th, the Pakistani forces that survived began their retreat to Kaliakar. Aftermath
The Tangail Airdrop and the subsequent capture of the Poongli bridge gave the advancing Indian Army a highway straight to Dhaka. The 95th Mountain Brigade's advance, assissted by the 167th Mountain Brigade, would be virtually unchecked. The fighting at Jamalpur and Poongli Bridge, combined with the fighting between the 3rd and 10th of December would virtually destroy the Paksitani 93rd Brigade. Brigadier Qadir, CO of the 93rd Brigade, would be captured by Indian troops - along with 26 other men and officers - on the 14th of December near while attempting to retreat to Kaliakar on foot. Eventually, only 900 men out of the 93rd's ~7,000 would reach Dhaka, with the rest having either been captured or killed. A Pakistani officer, Major (later Brigadier) Siddique Salik recalled the arrival in Dhaka of the bedraggled survivors of the 93rd: "I saw them arriving: they were unshaven, unwashed and even bootless. Their faces were starved, eyes sleepless and ankles swollen. They needed at least twenty-four hours to be able to participate in the defence of the provincial capital." Battle awards
Indian commander Lt Col Kulwant Singh was awarded the MVC for his leadership in battle. The 2 Paras were subsequently the first Indian forces to enter Dacca. For this and their role in Capture of the strategic bridge, the Paras received battle honour for Poongli Bridge and theatre honours for Dacca. 