The remnant of the Champa Kingdom in a small enclave in Southeast part of Mainland Southeast Asia, Panduranga, known to the Vietnamese as Thuan Thanh, had been annexed by the Vietnamese from the Nguyen lord's domain in 1692, who vassalized it instead of incorporating.[6] During the Tayson rebellion (1771-1789) as the Nguyen were overthrown, Panduranga king Po Tisuntiraidapuran switched alliance to the Tayson rebels.[7] By 1793, Panduranga effectively became a vassal client state of the Nguyen, who later conquered all of Vietnam in 1802.