The Western and Central factions of chimpanzees of the Ngogo hill region in Kibale National Park, Uganda, have been engaged in a violent conflict since 2015. The conflict has been characterized by one-sided violence, including killing, brutal attacks, and mutilations, by the Western faction against the Central faction. Because the Ngogo chimpanzees formerly constituted a single peaceful community that violently split apart, this conflict has been described as a "civil war". The New York Times said the conflict was the bloodiest among chimpanzees ever recorded.
This is the second major conflict between chimpanzees that has been observed by primatologists, the first being the Gombe chimpanzee war of the 1970s in Tanzania.
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