While Suniel Shetty's character is named as Capt. Bhairon Singh, there isn't any rank as Captain in the BSF.
In the real Longewala war Indian army had only two casualties but JP Dutta shown many casualties of Indian soldiers.
The airman closing the door of AN-32 aircraft before take off is wearing blue uniform. In 1971 the uniform was khakee and not blue. The blue uniform was introduced in 1991.
Mathura Das and Bhairon Singh are fictional characters in this film.