Assuming that I'm remembering the movies correctly, I've come up with this timeline: -The Creators create Transformium, the Allspark, and the first Transformers on Cybertron -Knights of Cybertron serve the creators -Knights revolt and overthrow the creators -Overtime, the Knights are forgotten and the Primes rise -The Fallen kills off the Primes -At some point, the Decepticons are defeated and The Fallen flees to the Nemesis -Overtime, the Dynasty of Primes and The Fallen are forgotten and "Prime" becomes a title passed down from Autobot to Autobot -Megatron finds the Nemesis, joins The Fallen, and revives the Decepticons