The Nationalist government of the Republic of China was established by the Kuomintang (KMT) in Guangzhou after the reorganization of the Army and Navy Marshal stronghold. Following the Northern Expedition, the government was able to defeat and overthrow the Beiyang government and become the legitimate government of China with its capital settled in Nanjing since 1927. The Nationalist government lasted until 20 May 1948 when it dissolved itself and was replaced by a constitutional government following the promulgation of a formal constitution. During the period the KMT-led government ruled China as a one-party state.