Myanmar contains 135 officially recognized ethnic groups distributed across eight major categories. The Bamar constitute approximately 68 percent of the 54.4 million population recorded in the 2014 census, the most recent complete national count. The Shan comprise roughly 9 percent, Kayin 7 percent, Rakhine 4 percent, Chinese 3 percent, Indian 2 percent, Mon 2 percent, with the remaining 5 percent distributed among groups including Kachin, Chin, Kayah, and numerous smaller populations. These percentages remain disputed by ethnic minority organizations who contest census methodology and classification criteria. The geographic distribution places most Bamar in the central Irrawaddy River valley and delta, Shan populations primarily on the eastern Shan Plateau, Kayin and Kayah in mountainous areas along the eastern border with Thailand, Mon in coastal lowlands near Mawlamyine, Rakhine along the western Bay of Bengal coast, Kachin in far northern highlands, and Chin in western mountains bordering India. This distribution reflects centuries of migration patterns, with highland groups maintaining distinct languages and cultural practices through geographic isolation while lowland populations experienced greater integration and cultural exchange.
The Pyu city-states represent the earliest urban civilizations in Myanmar, with archaeological evidence from Beikthano, Halin, and Sri Ksetra dating between 200 BCE and 900 CE. Chinese records from the Tang Dynasty describe Pyu states as Buddhist kingdoms engaged in trade networks extending to India and China. The Pyu built circular walled cities with sophisticated irrigation systems, the remains of which earned UNESCO World Heritage designation in 2014 as Ancient Pyu Cities. The Sri Ksetra site near modern Pyay contains brick stupas and palaces across an area of 1,400 hectares, with Sanskrit inscriptions indicating Theravada Buddhist practice by the 5th century. Pyu civilization declined between 800 and 900 CE following repeated raids by the Nanzhao kingdom from present-day Yunnan, with surviving populations absorbed into subsequent kingdoms. The Pyu legacy established Buddhism, urban planning traditions, and wet rice cultivation methods that successive cultures adopted and modified.
The Mon kingdoms controlled southern Myanmar and central Thailand from approximately 300 BCE onward, establishing Thaton as a major port linking Indian Ocean trade networks. Mon culture transmitted Theravada Buddhism from Sri Lanka to mainland Southeast Asia, along with the Mon script that became the basis for Burmese writing. The Mon built the Shwedagon Pagoda in Yangon beginning in the 6th century, according to traditional chronicles, though archaeological evidence confirms major construction occurred from the 14th century forward. Thaton fell to Bamar King Anawrahta in 1057, with Mon craftsmen, monks, and texts transported to Bagan. This conquest transferred Buddhist scholarship and architectural knowledge to the emerging Bagan kingdom. Mon populations maintained political autonomy in southern regions intermittently until the fall of Pegu to Bamar forces in 1757, after which Mon culture persisted through language, religious practice, and distinct village communities despite loss of political independence.
King Anawrahta unified the first Burmese empire at Bagan in 1044, conquering surrounding territories and establishing Theravada Buddhism as state religion. Bagan rulers constructed over 10,000 Buddhist temples, stupas, and monasteries between 1044 and 1287 along the eastern bank of the Irrawaddy River, of which approximately 2,200 structures survive. The Ananda Temple, completed in 1105 under King Kyanzittha, exemplifies Bagan architecture with its cruciform layout, four standing Buddha images each 9.5 meters tall, and central sikhara rising 51 meters. The Shwezigon Pagoda, begun by Anawrahta and completed by Kyanzittha, established the bell-shaped stupa design that became standard in Burmese Buddhist architecture. Bagan sponsored Pali scholarship, sent monks to Sri Lanka for ordination in 1071 to ensure orthodox transmission, and hosted the Fifth Buddhist Council in 1112. The kingdom's economy depended on rice cultivation in the dry zone requiring extensive irrigation from the Irrawaddy and its tributaries. Mongol invasions between 1277 and 1287 forced Bagan's kings to abandon the capital, though whether Mongol forces actually occupied Bagan remains debated among historians. The empire fragmented into competing Shan, Mon, and Bamar states that contested control for the next two centuries.
The Taungoo Dynasty reunified Myanmar between 1510 and 1752, achieving its greatest extent under King Bayinnaung who reigned from 1551 to 1581. Bayinnaung conquered the Shan states, Lan Na kingdom, Ayutthaya kingdom in Siam, and Lan Xang kingdom in Laos, creating an empire extending from Manipur to Cambodia. His campaigns required maintaining an army estimated at 500,000 including war elephants, cavalry, and Portuguese-supplied firearms. The Taungoo capital at Pegu contained a palace complex and Shwemawdaw Pagoda that reached 114 meters in height before earthquake damage. This expansive empire dissolved upon Bayinnaung's death as subject kingdoms regained independence and internal succession conflicts weakened central authority. The restored Taungoo Dynasty moved its capital to Ava in 1635, controlling a smaller territory focused on the Irrawaddy valley until Pegu fell to Mon forces in 1752, temporarily ending Bamar dominance.
The Konbaung Dynasty, founded by King Alaungpaya in 1752, represented the last Burmese empire before British colonization. Alaungpaya recaptured Ava, defeated Mon forces at Pegu in 1757, and extended control throughout the Irrawaddy valley and coastal regions. His son King Hsinbyushin invaded Ayutthaya in 1767, sacking the Siamese capital. King Bodawpaya, who ruled from 1782 to 1819, conquered Arakan in 1784, bringing the Mahamuni Buddha image to Mandalay where it remains at Mahamuni Pagoda. This westward expansion placed Burmese forces adjacent to British Bengal, creating border tensions that escalated into warfare. King Mindon, reigning from 1853 to 1878, modernized administration, established telegraph systems, and founded Mandalay as a new capital in 1857. Mindon convened the Fifth Buddhist Synod from 1868 to 1871, inscribing the entire Pali Canon onto 729 marble slabs housed at Kuthodaw Pagoda. His son King Thibaw Min presided over the final years of independence as British commercial interests and territorial ambitions intensified.
The First Anglo-Burmese War from 1824 to 1826 resulted from border disputes in Arakan and Assam. British East India Company forces captured Yangon and advanced up the Irrawaddy while simultaneous operations seized coastal territories. The Treaty of Yandabo in 1826 ceded Arakan, Assam, Manipur, and Tanintharyi to British control, and required Burma to pay one million pounds in indemnity. The Second Anglo-Burmese War in 1852 began after Burmese authorities seized British merchant ships in Yangon, prompting British forces to occupy lower Burma including Yangon, Pathein, and Mawlamyine. No formal treaty concluded this war; the British annexed lower Burma as a province of India while the Konbaung court retained upper Burma. The Third Anglo-Burmese War lasted only two weeks in November 1885. British forces advanced from Mandalay to the royal capital, capturing King Thibaw without significant resistance. Britain formally annexed upper Burma on January 1, 1886, ending Konbaung rule and incorporating all Burmese territories into British India as a province.