Gombe Chimpanzee War — violent conflict between two groups of chimpanzees in Tanzania during the 1970s
The first documented case of sustained, organized lethal warfare between non-human primates, observed by Jane Goodall at Gombe Stream National Park.
Key Facts
- Duration
- 1974 to 1978 (four years)
- Kahama males killed
- All 6 adult males eliminated
- Kasakela adult males
- 8
- Kahama separatists
- 6 adult males, 3 adult females and young
- Location
- Gombe Stream National Park, Tanzania
- Observer
- Jane Goodall
By the Numbers
Location
Cause → Event → Consequence
The Kasakela chimpanzee community began splintering around 1974, when a subgroup gradually separated and moved into the southern part of the Kasakela range. Over eight months this faction, comprising six adult males, three adult females, and their offspring, formed a distinct community renamed Kahama, creating two rival territorial groups from one.
Between 1974 and 1978, the Kasakela community waged a systematic campaign against the Kahama community in Gombe Stream National Park. Kasakela males hunted down and killed Kahama males one by one over the four-year period. The conflict was directly observed and documented by Jane Goodall and her research team, marking the first recorded instance of organized lethal intergroup violence among chimpanzees.
All six adult males of the Kahama community were killed, effectively dissolving the group. The victorious Kasakela then expanded southward into the former Kahama territory, gaining additional range. However, this territorial expansion was short-lived, as two neighboring chimpanzee communities repelled the Kasakela and prevented them from holding the newly acquired land.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent