Republic Day in Mongolia Date in the current year: November 26, 2024

Until 1911 Mongolia had been a part of China and ruled by the Manchu's Qing Dynasty. In 1911 Mongolia declared independence from China. Newly established Republic of China considered Mongolia to be its territory, that led to the tensions between two states. In 1919 Chinese troops occupied the territory of Mongolia.

In October 1920 Russia led its troops into Mongolia to defeat Chinese forces with the support of Mongols. Once again Mongolia declared its independence from China in 1921 and this event became the starting point of the close alignment of Mongolia with the Soviet Union. In the following years Soviet influence grew stronger in Mongolia and after the death of the Mongolian nominal head of the state, Bogd Khaan, the Mongolian People's Republic was proclaimed.