Plot
Background: On 25 March 1971, Pakistan Army soldiers entered Dhaka University and indiscriminately fired at students and staff, becoming known as the 1971 Dhaka University massacre. Pakistan's President Yahya Khan launched Operation Searchlight to crush the Bengali nationalist movement. Thousands were killed, and thousands of Bengali women were captured as sex slaves by the Pakistani Army. Millions fled across the border into India to take refuge.
Captain Balram Singh Mehta is a young officer in the 45th Cavalry regiment, which is equipped with the PT-76 tank, nicknamed 'Pippa'. He has some discipline issues and tends to often get into trouble with his senior officers. His elder brother is Major Ram Mehta, who is trying to instill some discipline in his younger brother. Radha Mehta is their sister, and the three of them live with their mother Maati in Delhi.
One day, Major Ram is called to a forward area in preparation for the upcoming war. Captain Balram is denied from going to the front and assigned a desk job because of his indiscipline, while the rest of his regiment proceeds to the front. Meanwhile, Radha proves herself to be good at cryptography and is recruited into the 'Communication and Analysis Wing', a signals intelligence organisation that decodes enemy messages.
Major Ram is ordered to covertly enter East Pakistan (Bangladesh) under a false name, to train the Mukti Bahini, and advise them in conducting operations. Captain Balram is ordered to work on the PT-76 tank to come up with some improvements, which he does successfully. While on an inspection tour, the Army Chief General Sam Manekshaw is impressed by his innovations and orders him to join his regiment on the front.
Major Ram leads the Mukti Bahini in a number of successful operations against the Pakistan Army. However, during one of the operations he gets captured. He is taken to a camp where he is tortured for information. However, he is able to endure the torture and does not reveal his identity or any other information.
Captain Balram's regiment along with the 14th Punjab battalion crosses the border and engages Pakistani units in the Battle of Garibpur. In the battle, Captain Balram's senior officer and squadron commander, Major Daljit "Chiefy" Singh Narang, is killed in action, requiring Captain Balram to assume command. Captain Balram successfully leads his unit to victory.
Soon after, he receives a call from Radha that as per intelligence sources, Major Ram is missing in action. By coincidence, a captured Pakistani Bengali officer who has rebelled against the Pakistan Army tells him that there is one Indian Army officer being held captive at a particular post.
Radha also decodes a Pakistani communication that indicates that the United States Seventh Fleet is moving towards East Pakistan in order to intervene in support of Pakistan. That brings an extra urgency to India's operations to secure victory and Pakistan's surrender before the US ships can get within striking distance.
Captain Balram's troop makes contact with the Mukti Bahini, who offers to lead him to the camp where Major Ram is being held. Major Ram is about to be shot for not revealing any information, but the Mukti Bahini rebels reach at the right time and shoot his would-be executioner. Captain Balram's tank unit also arrives, and after a fierce battle, the Pakistani camp is captured and many Bengali women being held as sex slaves are freed. Major Ram and Captain Balram are also reunited.
Shortly after, the Pakistan Army surrendered, and Bangladesh became independent. Major Ram, Captain Balram and Radha return home to their mother.
