 Complete the following phrase:  Since 1759, Tuva then called Tannu Uriankhai had been part of Mongolia, which in turn was a part of the territory of the Chinese Qing dynasty. As the Qing dynasty fell in the Xinhai Revolution of 1911, revolutions in Mongolia were also occurring, leading to the independence of both Mongolia and the Tuvan Uryankhay Republic. After a period of political uncertainty, the new republic became a protectorate of the Russian Empire in April 1914, known as Uryankhay Krai. After the 