In the 1970s Rohingya separatist movements emerged from remnants of the mujahideen, and the fighting culminated with the Burmese government launching a massive military operation named Operation Dragon King in 1978 to expel so-called "foreigners".[52] In the 1990s, the well-armed Rohingya Solidarity Organisation (RSO) was the main perpetrator of attacks on Burmese authorities near the Bangladesh–Myanmar border.[53] The Burmese government responded militarily with Operation Clean and Beautiful Nation, but failed to disarm the RSO.[54][55]