Kaon

? BCE (Before the Great War)

Megatron Origin 1 – Kaon is supposed to be one of the worst places on Cybertron, and after the revolt on Mining Outpost C-12, Megatron steals a ship and the fleeing miners hide in the Kaon underground.

Megatron Origin 2 – Kaon is also the site of various illegal gladitorial arena’s, where energy depleted cybertronians come to fight eachother. This is the place where Megatron takes control of Clench’s team, and the subsequent creation of the Decepticons.
Sentinel Prime works as a security head in Kaon, and hears news of the gladiators, who are making someone a fortune with the sold vid-discs of the matches. Sentinel Prime orders the Autobots to find these gladiators and arrest them.

Megatron Origin 3 – The city seems to be in an increasing flow of chaos as the industrial sector gets sabotaged, security forces get killed, the local populace becomes poison, bombs are found and transport centers are being destroyed. Senator Decimus also gets kidnapped.

Megatron Origin 4 – In the Kaon Autobot Security HQ there’s a massive prisoner escape caused by Starscream after he and Soundwave killed the senate. The prisoners go wild with rage and kill and destroy anything they see. The Autobots try to stop them, but the situation is desperate. Sentinel Prime uses the Apex armor, but he is no match for Megatron, who kills him. This defeat causes the Autobots to retreat to Iacon and leave Kaon to the Decepticons.

Kaon

Transformers - Tempus Exitium Slain