The KNPLF was formed in 1978, when a group of left-wing fighters split from the Karenni Army due to ideological differences.

In 1983, under CPB's leadership, KNPLF alongside Kayan New Land Party and Shan State National Liberation Organisation formed the central regional command.

[13]Four KNPLF / BGF soldiers were murdered alongside at least 45 civilians during the Mo So massacre committed by the Burmese military on the Christmas Eve of 2021.

KNPLF / BGF personnel tried to negotiate with soldiers from the Burmese army to stop them from burning civilians alive but were instead murdered by being shot in their heads.

[14][15][16] KNPLF has also received weapons from the powerful United Wa State Army (UWSA) post-military coup and allegedly been involved in resistance efforts against the Burmese military despite being reformed as a Border Guard Force.