From 7–9 December 2009, a Pa-O National Conference was held in the
Pa-O Self-Administered Zone, and the Pa-O People's Liberation Organization (PPLO), led by Colonel Khun Okkar, and Shan State Nationalities People's Liberation Organization, led by Brigadier General Khun Ti Soung, merged and established the Pa-O National Liberation Army (PNLA) and its political wing, the
Pa-O National Liberation Organisation (PNLO). Group leaders then drafted the PNLO constitution, which became the
de facto constitution for the Pa-O SAZ. On 24 January 2024, the PNLA, local
PDF forces, and the KNDF attacked the PNO/Junta-controlled town of
Hsi Hseng. The Tatmadaw responded with airstrikes and shelling. On 26 January 2024, the PNLO formally revoked their participation in the
Nationwide Ceasefire Agreement and pledged to help the NUG replace the Junta with a federal system. The PNLO implored the
Pa-O National Organization to switch sides under the promise that they will not be attacked. On 10 September, Khun Okka broke away from the PNLO to continue negotiating with the SAC under the NCA. ==Operational areas==