BSF or The Border Security Force was established on December 1, 1965. it is a paramilitary force charged with guarding India's land border during peace time and preventing transnational crime. Which ensures the security of Indian Border. It’s considered as the world's largest border guarding force. BSF has been termed as the First Line of Defence of Indian Territories.
BSF is a paramilitary unit, which is a part of the central armed police reserve which include CISF/ CRPF / ITBP and SSB.
History : Till 1965 India’s borders with Pakistan were manned by the State Armed Police Battalion. Pakistan attacked Sardar Post, Chhar Bet and Beria Bet on 9 April, 1965 in Kutch. This exposed the inadequacy of the State Armed Police to cope with armed aggression due to which the Government of India felt the need for a specialized centrally controlled Border Security Force, which would be armed and trained to man the International Border with Pakistan. As a result of the recommendations of the Committee of Secretaries, the Border Security Force came into existence on 01 Dec 1965, and Shri K F Rustamji was the first chief and founding father.