1944

September – Major Seagrim, the British commander of anti-Japanese operations in the eastern hill is executed by the Japanese along with a number of his Karen levies..

1945

September 5th – 9th – Meeting in Kandy between Mountbatten, 10 Burmese military leaders, and Saw Ba U Gyi. An agreement to set up a regular Burmese army is formulated.

September - KCO sends a memorandum to the British asking that their United Frontier Karen States be recognised to include all of Tenesserim, Nyaunglebin, a sub-division of Pegu, and parts of Thailand as far as Chiang Mai.

1947

September 24th – Constituent Assembly agrees to the terms discussed at Panglong giving the Karenni and the Shan the right to secede after ten years. There is no provision for the Karen.

1948

September 1st  – KNDO seize Thaton and Moulmein possibly in an attempt to secure a landing point for supplies from the Friends of the Burma Hill People.

September 11th – Burma’s Military Intelligence aided by MI5 uncovers a plot by Alexander Campbell and Cromarty-Tulloch, both of whom are ‘Friends of the Burma Hill People’ to support the Karen National Union. Campbell is expelled after he threatens to tell all he knows. 

1950

September 21st  – A meeting is held at Mawchi to choose a successor to Saw Ba U Gyi. After U Hla Pe declines the offer due to his work with the Pa-oh – J Poo Nyo takes the position.

1952

September – A Karen state is finally recognized by the U Nu government but is rejected by the KNU as it is predominantly restricted to inhospitable mountain areas and excludes the delta. 

1953

September - At a small meeting in Gayteau village, Maubin, the KNUP is inaugurated.

1965

September 9th– The NRA is formed.

September - Lin Tin, 5th Brigade commander who surrendered in 1963 with Saw Hunter Tha Mwe, is killed by Burmese agents

1974

September - 9th KNU Congress is held at Bee Hee Lu on the Moei River. A right wing, capitalist stance is endorsed and all previous references to socialist and left leaning ideology are removed from the official records.

1982

September 28th – Karen forces attack a Radio and Police station in Rangoon. Two of the perpetrators are killed and three captured.