Megatron

Early Life
Megatronus began his life as a miner. He worked outside of Kaon alongside Soundwave. The two became close friends, but the mining facility was full of shady business. The council controlling Cybertron saw the miners as slaves and this angered Megatron. He attacked the guard and accidentally killed a senator. This caused him to be sent to a prison closer to the city.

In prison, Megatronus met other bots like Galvatron and Overlord. They all worked together and were able to escape prison afterward. Galvatron went back to being a mercenary while Megatronus tried to find his own way. To get money, Megatronus became a gladiator. As a gladiator, Megatronus became famous around Kaon.

After a while, Megatronus was met by Magnum who offered him to join the Elite Guard. The two became friends and Megatronus became a teacher at the Elite Guard Acadamy. There, Megatronus met Orion Pax and the scientist Shockwave. But soon a riot was taking place at the mining facility Megatronus worked at earlier. They got there and instead of fighting the miners, Megatronus and Orion joined their side. Megatronus was now reunited with his old friend Soundwave. The two helped each other and was able to make a statement.

Decepticons
After this, Megatronus decided to become a politician and change Cybertron. Orion told him to change his name as The Fallen was once called Megatronus. Megatronus listened and changed his name to Megatron. They soon started riots and such. Megatron and Orion led the ones who got the name Decepticons.

A riot later got out of hand. Thirty Cybertronian were killed. This caused Orion to leave the cause. Megatron got to the library where Orion worked to get Energon. Orion refused which made Megatron shoot at Orion without lethally wounding him. But Megatron missed Orion and hit the Energon. It blew up and nearly killed Orion.

After this, Megatron kept going after the control of Cybertron. Soon he even started a war.

Great Civil War
Megatron became the largest conqueror on Cybertron. Megatron fought and killed Zeta Prime which made Sentinel Prime take control of the Autobots. He also turned Starscream to the Decepticons. The Decepticons became the largest faction on Cybertron. Megatron even got control of Kaon and for a while, Iacon.

Later, Megatron was able to kill Sentinel Prime as well. He grew stronger every day and started to rule the whole planet. He even got Tripticon to help the Decepticons. But soon, Megatron would have to fight back as Optimus Prime became the new leader of the Autobots. The battles grew larger and harder for the Decepticons. Until Megatron drove them all away from Cybertron in the Ark. Doing so, Megatron followed in the Nemesis to kill every last Autobot and his new true rival in Optimus.