Mongolia is a landlocked country in East Asia. It is bordered by Russia to the north and China to the south and covers an area of 1,564,116 square kilometers (603,909 square miles), making it the 18th-largest country in the world and the second largest landlocked nation after Kazakhstan, as well as the largest landlocked country that does not border an inland sea. With a population of 3.5 million, Mongolia is the world's most sparsely populated sovereign state, excluding Western Sahara. The country constitutes a significant portion of the Mongolian Plateau, and its natural environment is characterized by grassy steppe, mountains to the north and west, and the Gobi Desert to the south. Ulaanbaatar, the capital and largest city, is home to roughly half of the country's population.
The territory of modern-day Mongolia has been ruled by various nomadic empires, including the Xiongnu, the Xianbei, the Rouran, the First Turkic Khaganate, the Second Turkic Khaganate, the Uyghur Khaganate and others. In 1206, Genghis Khan founded the Mongol Empire, which became the largest contiguous land empire in history. His grandson Kublai Khan conquered China proper and established the Yuan dynasty. After the collapse of the Yuan, the Mongols retreated to Mongolia and resumed their earlier pattern of factional conflict, except during the era of Dayan Khan and Tumen Zasagt Khan.
In the 16th century, Tibetan Buddhism spread to Mongolia. The Qing dynasty absorbed the country in the 17th century. By the early 20th century, almost one-third of the adult male population were Buddhist monks. After the collapse of the Qing dynasty in 1911, Mongolia declared independence and achieved actual independence from the Republic of China in 1921. Shortly thereafter, the country became a satellite state of the Soviet Union. In 1924, the Mongolian People's Republic was founded as a socialist state. After the anti-communist revolutions of 1989, Mongolia conducted its own peaceful democratic revolution in 1990. This led to a multi-party system, a new constitution of 1992, and transition to a market economy.
Approximately 30% of the population is nomadic or semi-nomadic; horse culture remains integral. Mahayana Buddhism is the majority religion (51.7%), with the irreligious being the second-largest group (40.6%). Islam is the third-largest religious identification (3.2%), concentrated among ethnic Kazakhs. The vast majority of citizens are ethnic Mongols, with roughly 5% of the population being Kazakhs, Tuvans, and other ethnic minorities, who are especially concentrated in the western regions. Mongolia is a member of the United Nations, Asia Cooperation Dialogue, G77, Asian Infrastructure Investment Bank, Non-Aligned Movement and a NATO global partner. Mongolia joined the World Trade Organization in 1997 and seeks to expand its participation in regional economic and trade groups.
The name Mongolia means the "Land of the Mongols" in Latin. The Mongolian word "Mongol" (монгол) is of uncertain etymology. Sükhbataar (1992) and de la Vaissière (2021) propose it is a derivation from Mugulü, the 4th-century founder of the Rouran Khaganate, first attested as the 'Mungu', (Chinese: 蒙兀, Modern Chinese Měngwù, Middle Chinese Muwngu), a branch of the Shiwei in an 8th-century Tang dynasty list of northern tribes, presumably related to the Liao-era Mungku (Chinese: 蒙古, Modern Chinese Měnggǔ, Middle Chinese MuwngkuX).
After the fall of the Liao dynasty in 1125, the Khamag Mongols became a leading tribe on the Mongolian Plateau. However, their wars with the Jurchen-ruled Jin dynasty and the Tatar confederation had weakened them. The last head of the tribe was Yesügei, whose son Temüjin (Genghis Khan) eventually united all the Shiwei tribes as the Mongol Empire (Yekhe Monggol Ulus). In the 13th century, the word Mongol grew into an umbrella term for a large group of Mongolic-speaking tribes united under the rule of Genghis Khan.
Since the adoption of the Constitution of Mongolia in 1992, the official name of the state is "Mongolia" (Mongol Uls).
The Khoit Tsenkher Cave in Khovd Province shows lively pink, brown, and red ocher paintings (dated to 20,000 years ago) of mammoths, lynx, bactrian camels, and ostriches, earning it the nickname "the Lascaux of Mongolia". The Venus figurines of Mal'ta (21,000 years ago) testify to the level of Upper Paleolithic art in northern Mongolia; Mal'ta is now part of Russia.
Neolithic agricultural settlements (c. 5500–3500 BC), such as those at Norovlin, Tamsagbulag, Bayanzag, and Rashaan Khad, predate the introduction of horse-riding nomadism, a pivotal event in the history of Mongolia which became the dominant culture. The ethnogenesis of Mongolic peoples is largely linked with the expansion of Ancient Northeast Asians. The pastoralist lifestyle may in part be derived from the Western Steppe Herders but without much geneflow between these two groups, suggesting cultural transmission.
Horse-riding nomadism has been documented during the Copper and Bronze Age Afanasevo culture (3500–2500 BC); this Indo-European culture was active to the Khangai Mountains in central Mongolia. The wheeled vehicles found in the burials of the Afanasevans have been dated to before 2200 BC. Pastoral nomadism and metalworking became more developed with the Okunev culture (2nd millennium BC), Andronovo culture (2300–1000 BC) and Karasuk culture (1500–300 BC), culminating with the Iron Age Xiongnu Empire in 209 BC. Monuments of the pre-Xiongnu Bronze Age include deer stones, khirigsuur kurgans, square slab tombs, and rock paintings.
Although cultivation of crops has continued since the Neolithic period, agriculture has always remained small in scale compared to pastoral nomadism. Agriculture may have first been introduced from the west or arose independently in the region. The population during the Copper Age has been described as mongoloid in the east of what is now Mongolia, and as europoid in the west. Tocharians (Yuezhi) and Scythians inhabited western Mongolia during the Bronze Age. The mummy of a Scythian warrior, which is believed to be about 2,500 years old, was a 30- to 40-year-old man with blond hair; it was found in the Altai Mountains. As equine nomadism was introduced, the political center of the Eurasian Steppe shifted to Mongolia, where it remained until the 18th century. The intrusions of northern pastoralists (e.g. the Guifang, Shanrong, and Donghu) into China during the Shang dynasty (1600–1046 BC) and Zhou dynasty (1046–256 BC) presaged the age of nomadic empires.
Since prehistoric times, Mongolia has been inhabited by nomads who, from time to time, formed great confederations that rose to power and prominence. Common institutions were the office of the Khan, the Kurultai (Supreme Council), left and right wings, imperial army (Kheshig) and the decimal military system. The first of these empires, the Xiongnu of undetermined ethnicity, were brought together by Modu Shanyu to form a confederation in 209 BC. They emerged as the greatest threat to the Qin dynasty, forcing the latter to construct the Great Wall of China. It was guarded by up to almost 300,000 soldiers during Marshal Meng Tian's tenure, as a means of defense against the destructive Xiongnu raids. The vast Xiongnu empire (209 BC–93 AD) was followed by the Mongolic Xianbei empire (93–234), which also ruled more than the entirety of present-day Mongolia. The Rouran Khaganate (330–555) of Xianbei provenance was the first to use "Khagan" as an imperial title. It ruled a massive empire before being defeated by the Göktürks (555–745), an even larger empire.
The Göktürks laid siege to Panticapaeum, present-day Kerch, in 576. They were succeeded by the Uyghur Khaganate (745–840) who were defeated by the Kyrgyz. The Mongolic Khitans, descendants of the Xianbei, ruled Mongolia during the Liao dynasty (907–1125), after which the Khamag Mongol (1125–1206) rose to prominence.
Lines 3–5 of the memorial inscription of Bilge Khagan (684–737) in central Mongolia summarizes the time of the Khagans: