Zanj Empire

The Zanj Empire was a 19th-century political formation established by the Omani sultanate on the Swahili Coast. Known for its slave-trading activities in conjunction with the local Swahili people, at its peak the polity's reach stretched as far as Eastern Congo. Eventually, the "Empire" collapsed when the British, intent on ending the slave trade, overtook it and incorporated it into the British Empire in 1896.