Nang Noung Noung The Restoration Council of Shan State (RCSS) and the Pa-O National Liberation Army (PNLA) fought for an hour in southern Shan State after the former armed group reportedly attacked the latter near Wan Khieng village in the early morning of 20 May. “PNLA troops often attack our troops in the area, but this time our soldiers defended themselves and fired back.