Q. Which militant group was formed in 1980 by leaders opposing the Shillong Accord in Nagaland?
Answer: National Socialist Council of Nagaland (NSCN)
Notes: The NSCN was established in 1980 by Isak Chishi Swu, Thuingaleng Muivah, and others who opposed the Shillong Accord; it later split into the NSCN-IM and NSCN-K factions.