Millions of years ago in a valley in eastern Africa, there lived tribes of protohuman primates. At the time of initial contact with Transformers, there was little obvious external difference between the protohumans and other animals sharing their environment. But since the protohumans were destined to evolve into the modern human race, which would in turn play a key role in the Great War, these simple creatures were targeted for destruction by the time-travelling Predacons.