In 1946, the promulgated a new constitution and the first National Assembly met in 1948 in Nanjing, the Chinese capital. Shortly afterwards in 1949, mainland China fell to the Communists in the Chinese Civil War, and the National Assembly (along with the entire ROC government) was relocated to Taipei. Apart from the KMT, the only legal parties were the Democratic Socialist Party and the Youth Party. At that time the NA served as a counterpart to the Supreme Soviet of the Soviet Union, with a Presidum of the National Assembly governing over its activities.