The People’s Revolutionary Party of Kangleipak (PREPAK) was formed under the leadership of RK Tulachandra on October 9, 1977. Claiming to be the "most genuine revolutionary groups" in Manipur, the PREPAK’s main demand is the expulsion of ‘outsiders’ from the State.

PREPAK became dormant after its leader Tulachandra was killed in an encounter with the security forces in 1986. Following his death, S Wanglen became the commander-in-chief of PREPAK. The organisation's general secretary, Lumbeban Masunga was killed on May 19, 1993. At present, Achamba is the chairman and Tajila is the commander-in-chief . The group has a strength of approximately 200 insurgents. It is primarily trained by the National Socialist Council of Nagalim -Isak Muivah (NSCN-IM). The PREPAK is also part of Manipur People's Liberation Front (MPLF), along with United National Liberation Front (UNLF) and the People's Liberation Army (PLA).

It is largely confined to the valley in Manipur. PREPAK is also reported to carry out attacks in certain areas of Mizoram and in North Tripura. One of its camps is in Sajik Tampak in the Chandel district in Manipur. It also operates in Tizit in Nagaland's Mon district. PREPAK is reported to have received weapons and training in exchange for hard cash from the Kachin Independent Army (KIA) of Myanmar. It is also reported to have training camps in Bangladesh.