Aung San made plans to organize an anti-Japanese uprising in Burma, secretly forming the "Anti-Fascist People's Freedom League" in August and September 1944 following a secret meeting in Bago between the Burma National Army, the Burmese Communist Party, and the People's Revolutionary Party (which later reformed into the Socialist Party). Following this meeting, Aung San's forces began to secretly store supplies in preparation of their fight against the Japanese. In late March 1945, as Allied forces advanced towards Rangoon, Aung San led the BNA in a parade in front of Government House in Rangoon, after which they were sent by the Japanese to the front. A few days later, on 27 March, the BNA switched sides and attacked the Japanese instead. 27 March came to be commemorated as Resistance Day, until the military regime renamed it "Tatmadaw (Armed Forces) Day".