In 1912, the Republic of China officially succeeded the Qing Dynasty, while Outer Mongolia, Tibet and Tuva proclaimed their independence. Independence was not accepted by the government of China. By the Treaty of Kyakhta (1915) Outer Mongolia recognized China's sovereignty. However, the Soviet threat of seizing parts of Inner Mongolia induced China to recognize Outer Mongolia's independence, provided that a referendum was held. The referendum took place on October 20, 1945, with (according to official numbers) 100% of the electorate voting for independence.