The Special Frontier Force (SFF) is a paramilitary Indian special forces unit composed primarily of Tibetan refugees and Gurkhas in India. It was established after the Sino-Indian War of 1962 to primarily conduct covert operations behind the Chinese lines in case of another war with China. Later it increased in size and scope of operations.
Throughout its history, SFF has fought in India's major external wars including the Bangladesh Liberation War and the Kargil War. It has also been involved in internal security, including Operation Blue Star and also serving as the "Personal Force" of Prime Minister Indira Gandhi to suppress opposition parties during the state of emergency from 1975 to 1977. It has been part of border operations against China, including the 2020–2021 China–India skirmishes.