Assam, officially the Kingdom of Assam (Assamese: আহোম ৰাজ্য), also refered as Ahom (in the English-speaking world) is a soverign state in northeast India (OTL South Asia).
The history of Assam is the history of a confluence of people from the east, west and the north; the confluence of the Indo-Aryan, Austroasiatic and Tibeto-Burman cultures. Although invaded over the centuries, it was never a vassal or a colony to an external power.
The history of Assam has been derived from multiple sources. The Ahom kingdom of medieval Assam maintained chronicles, called Buranjis, written in the Ahom and the Assamese languages. History of ancient Assam comes from rock inscriptions and the many copper plates and royal grants the Kamarupa kings issued during their reign. Protohistory has been reconstructed from folklore: epics like Mahabharata, and two medieval texts compiled in the Assam region—the Kalika Purana and the Yogini Tantra.
The history of Assam can be divided into four eras. The ancient era began in the 4th-century with the mention of Kamarupa in Samudragupta's Allahabad pillar and the establishment of theKamarupa kingdom. The medieval era began with the Turko-Afghan attacks from Bengal, the first of which took place in 1207 as mentioned in the Kanai-boroxiboa rock inscription, after the breakup of the ancient kingdom and the sprouting of medieval kingdoms and chieftainships in its place.The early modern era began when Assam managed to escape colonization by the British in different battles in the 1820s.
History after the 1820s
After the 1820s, Assam followed other Indian countries and started becoming industrial. In 1885, Assam's modern borders were established the Treaty of Guwahati, and the new borders extended to the Himilayas and eliminated conflict with Kunbaung Dynasty Burma. After seeing European Imperialism, Assam fought alonside the allies in both World War I and World War II. During the cold war, Assam experienced growth in development and was identified by westernern allies as a capitalist nation. In present day, Assam is engaged with battles against China after seeing China as a threat, along with seperatist groups, such as the Bodo independence group.