The Battle of Basantar, also known as the Battle of Shakargarh or Battle of Barapind, was one of the vital battles fought as part of the Indo-Pakistani War of 1971 in the western sector of India. From Wikipedia
The film, directed by Sriram Raghavan and starring Dharmendra and Agastya Nanda, explores the life of Second Lieutenant Arun Khetarpal during the 1971 Indo-Pak war.