Moonbase One

Moonbase One is a base... on a moon... orbiting Cybertron from the Generation 1 continuity family.

Moonbase One is an Autobot base on one of Cybertron's two moons, with the other one naturally being the location of Moonbase Two. It appears to have been primarily a command base during fight against Decepticon-controlled Cybertron.

Fiction

Cartoon continuity

In 2005, many Autobots were stationed on Moonbase One, including Optimus Prime, Ratchet, Ironhide, Prowl, Brawn, and the Dinobots, but only Jazz and Cliffjumper were left behind when Optimus Prime went to provide reinforcements to Autobot City.

Not too long afterwards, Moonbase One was targeted and devoured by Unicron. It spent a while being slowly digested within Unicron's bowels, up until he was obliterated by a mystical glowing thingy. The Transformers: The Movie