These murders and Mwanga's continued resistance alarmed the British, who backed a rebellion by Christian and Muslim groups who supported Mwanga's half brother and defeated Mwanga at Mengo in 1888. Mwanga's brother, Kiweewa Nnyonyintono, was elevated to the throne. He lasted exactly one month and was replaced on the throne by another brother, Kabaka Kalema Muguluma. However, Mwanga escaped and negotiated with the British. In exchange for handing over some of his sovereignty to the British East Africa Company, the British changed their backing to Mwanga, who swiftly removed Kalema from the throne in 1889. He later converted to Christianity and was baptised.