Cybertron is the home planet of the Transformers.
Cybertron was created by Primus five billion years prior to 2017. Twelve million years ago, the mysterious Talisman was on Cybertron in the possession of Onyx Prime. Unlike the planets protected by the Solstar Order, Cybertron perfected interstellar travel before achieving a unified world peace. Four million years ago, the Great War between Autobots and Decepticons began an ended in 2012. The collateral damage of the war caused the Cybertronians to become one of the most hated and feared species in the galaxy.
Repeated Cybertronian incursions on Earth had convinced Joe Colton that one day Cybertron would destroy Earth so he decided to strike first and wipe Cybertron off the cosmic map. He planned to do so by having Shazraella enerchange the Talisman, who's energy was anathema to Cybertronians, with Cybertron's very core thereby poisoning all the energon on the planet. The Solstar Order detected the Dire Wraith genetics within the Red Shadows and sent four of its Space Knights to place Cybertron under quarantine, preventing the Carcerians from teleporting in reinforcements. Deducing that Colton's group had piggybacked the signal of the M.A.S.S. Device on a Cybertronian Space Bridge, Soundwave, G.I. Joe and M.A.S.K. replicated the method and arrived in the centre of Iacon. To obstruct any humans pursuers, Colton released poisonous gas into Cybertron's synthetic oxygen atmosphere. When speaking to the Council of Worlds, Scarlett revealed Colton was headed to the core to plant something that would bring about the end of the Cybertronian people. Knowing that the Cybertronians wouldn't take a human-based threat seriously, Colton was able to outmaneuver the Cybertronian security forces and escape Metroplex into the depths of the planet.