A group of chimpanzees are called a troop. A troop of males goes out to patrol their area and if they run into other chimps they will try to chase them off or even attack them. They have been known to beat outsiders almost to death, They will also hunt lesser monkeys and other small animals for food. read more
The official name for a group of chimpanzees is a troop (or troupe). So if you see several chimpanzees together, they are/part of a troop. read more