The I-Kiribati people settled what would become known as the Gilbert Islands between 1000 and 1300 AD. Subsequent invasions by Fijians and Tongans introduced Melanesian and Polynesian elements to the Micronesian culture, but extensive intermarriage has produced a population reasonably homogeneous in appearance and traditions.
European contact began in the 16th century. Whalers, slave traders, and merchant vessels arrived in great numbers in the 1800s, fomenting local tribal conflicts and introducing often-fatal European diseases. In an effort to restore a measure of order, the Gilbert and Ellice Islands (the Ellice Islands are now the independent country of Tuvalu) consented to becoming British protectorates in 1892. Banaba (Ocean Island) was annexed in 1900 after the discovery of phosphate-rich guano deposits, and the entire group was made a British colony in 1916. The Line and Phoenix Islands were incorporated piecemeal over the next 20 years.