The Tanggu Truce, sometimes called the Tangku Truce (Japanese: 塘沽協定, Hepburn: Tōko kyōtei, simplified Chinese: 塘沽协定; traditional Chinese: 塘沽協定; pinyin: Tánggū Xiédìng), was a ceasefire that was signed between the Republic of China and the Empire of Japan in Tanggu District, Tianjin, on May 31, 1933. It formally ended the Japanese invasion of Manchuria, which had begun in 1931.