From 1945 to 1947, under United States mediation, especially through the Marshall Mission, the Nationalists and Communists agreed to start a series of peace talks aiming at establishing a coalition government. The two parties agreed to open multiparty talks on post-World War II political reforms via a Political Consultative Conference. This was included in the Double Tenth Agreement. This agreement was implemented by the Nationalist Government, who organized the first Political Consultative Assembly from 10–31 January 1946. Representatives of the Kuomintang, Communist Party of China, Chinese Youth Party, and China Democratic League, as well as independent delegates, attended the conference in Chongqing. However, shortly afterward, the two parties failed to reach an agreement and the civil war resumed. In the context of political and military animosity, the National Assembly was summoned by the Nationalists without the participation of the Communists and promulgated the Constitution of the Republic of China. The constitution was criticized by the Communists, and led to the final break between the two sides. The full-scale civil war resumed from early 1947.