evidence: The Mongol court returned to its native land, however, centuries of internal conflict, expansion and contraction brought them fall into Manchu Qing dynasty. They conquered Inner Mongolia in 1636. Outer Mongolia was submitted in 1691. For the next two hundred years Mongolia was ruled by the Qing Dynasty until 1911. Mongolia declared its independence in 1911 under the Bogd Khan, the spiritual leader of Mongolia’s Tibetan Buddhism. However, the Chinese government still considered "Outer Mongolia" as part of it and invaded the country in 1919. [...] Mongolia is the world’s second largest landlocked country and occupies a territory of 1.56 million square kilometers. Mongolia is located in Northern Asia, bordered by Russia in the north and China in the south, east and west. Mongolia is the world’s least densely populated country, with a population of more than 3.1 million people living in a vast area of 1.56 million square kilometers. Ulaanbaatar is Mongolia’s capital and largest city and home to approximately 45% of the country’s population.