According to one oral tradition, the Garos first immigrated to Garo Hills from Tibet (referred to as Tibotgre) around 400 BC under the leadership of Jappa Jalimpa, crossing the Brahmaputra River and tentatively settling in the river valley. The Garos finally settled down in Garo Hills (East-West Garo Hills), finding providence and security in this uncharted territory and claiming it their own. Records of the tribe by invading Mughal armies and by British observers in what is now Bangladesh wrote of the brutality of the people.