This was movie was inspired on real events. Though it was not shown before the movies, just like when they make from real events or inspired from true events. It is a great movie. It is much better than Ranbir Kapoor "ANIMAL" movie. The action is/was super. The fights everything is super. If this movie had a Bollywood Super star as the main actor, it would have got much attention and recognised. If you don't believe me you can Google it. Below is the copied article from Google.
On September 2, 2010, Bishnu Shrestha, a 35-year-old retired Gurkha soldier, was traveling on the Maurya Express from Ranchi to Gorakhpur when he intervened in a train robbery. Shrestha saved a girl from being raped by the robbers and fought off 40 bandits in the train's narrow aisle. After about 10 minutes, three bandits were dead and many were wounded, and the remaining bandits fled with the stolen goods. Shrestha suffered a severe injury to his left arm and needed two months of medical treatment to recover. For his actions, the Indian government awarded him the Sena Medal, which is given for "exceptional devotion to duty or courage".