Little Cybertron
With Earth now a cosmic stopover for mechanoids from all over the galaxy, the United States commissioned the construction of "Little Cybertron": a Transformer-scaled city in the Bikini Atoll where Autobots, Decepticons, humans, Junkions, and Sharkticons can peacefully coexist.
Fiction
IDW Generation 1 continuity
Following the tumultuous arrival of Wreck-Gar, Rum-Maj, and their tribe of wandering Junkions on Earth, Optimus Prime managed to negotiate a ceasefire between his Autobots and the alien mechanoids. In the aftermath, the Junkions opted to remain on Earth, and Marissa Faireborn came up with the idea of letting them stay on an abandoned Earth Defense Command base in the Pacific. The Autobots and the Navy escorted the Junkions to the Bikini Atoll, where the resourceful Junkions began stripping the base for parts and turning it into a new settlement. Feel Safe Without Regrets
Optimus Prime parked Metrotitan a short ways away from the island to keep an eye on the Junkions, and stationed several Autobots – including Pyra Magna's crew of Torchbearers and some new colonist recruits – to help the rebuilding efforts. Feel Safe Without Regrets What It's Really Like Optimus Prime and Pyra Magna also buried Oiler's body on the island, where the colonists held a small funeral for their fallen comrade. The Next Day, and the Next
G.I. Joe assets became involved in the construction of the city, and eventually Faireborn and Flint toured the growing refugee colony. Marissa was enthusiastic about the idea, and even befriended Pyra Magna, though her father found the concept distasteful. The Next Day, and the Next Though the Junkions appreciated their engineering prowess, the colonists quickly grew bored with life on the island and began passing the time by feeding the Sharkticons. What It's Really Like