Gombe Chimpanzee War
... that one chimpanzee group killed off all the adult males in another chimpanzee group during the Gombe Chimpanzee War?
... that one chimpanzee group killed off all the adult males in another chimpanzee group during the <b id="mwBWs"><a href="./Gombe_Chimpanzee_War" id="mwBWw" rel="mw:WikiLink" title="Gombe Chimpanzee War">Gombe Chimpanzee War</a></b>?