The
Ahoms established the
Ahom kingdom (1228-1826) in parts of present-day
Assam and ruled it for nearly 600 years. Historical documents do not call the kingdom "Ahom". They call it "Asam" (or Assam), and the subjects of this kingdom "Assamese" or "Axomiya". After the advent of the British, the meanings of these categories changed. "Ahom" as a term appears in the
Buranjis to denote the collection of civil and military officers under the Ahom king, all of which were non-hereditary offices.
In early 13th century, Sukaphaa, a Shan (Mong Mao) prince began his journey with about 9000 followers, mostly men. He crossed the Patkai hills, fought and defeated the Nagas and reached the Brahmaputra valley in 1228. He moved from place to place, searching for a seat. He decided not to attack the Morans and Borahis but befriend them instead. His followers, much depleted from the original 9000, married into the Borahi and the Moran ethnic groups. The Borahis, a Tibeto-Burman ethnic group, were subsumed into the Ahom fold, though the Moran maintained their independent ethnicity. Sukaphaa finally established his capital at Charaideo near present-day Sibsagar in 1253 and began the task of state formation.
The Ahom kingdom then consolidated its powers for the next 300 years or so. The first major expansion was at the cost of the Chutiya kingdom, which was annexed in 1522 under Suhungmung. The expansion was not just a success of Ahom military prowess, but also a result of changes in the Ahom social and political outlook. For example, Suhungmung was the first Ahom king to adopt a Hindu name Swarga Narayan. The Chutiya region was placed under the Sadiyakhowa Gohain a new position that was created. In 1536 the Kacharis were uprooted from their capital at Dimapur. Thus by the middle of the 16th century, the Ahoms were in control over eastern Assam. In 17th century, after the Battle of Itakhuli in 1682 that marked the end of the Ahom-Mughal conflicts, much of the control of Koch Hajo fell into the hands of the Ahoms.
Their power declined in later half of the 18th century. The capital city was taken for a short period during the Moamoria rebellion. In the first part of the 19th century, the Burmese army invaded their kingdom who set up a puppet Ahom king. The Burmese were defeated by the British in the First Anglo-Burmese War resulting in the Treaty of Yandaboo in 1826, which paved the way for the British to convert the Ahom kingdom into a principality and which marked the end of the Ahom rule.