Thread:Wingstrike/@comment-31088226-20170728051637/@comment-3542404-20170728081807

Apparently, not very much happened until after the One Year War: "The red planet is mentioned in the manga Mobile Suit Gundam F90, where it is revealed that the planet became home to some refugees from the Principality of Zeon after its defeat in the One Year War. These refugees, known as Mars Zeon, settled at the volcanic mountain Olympus Mons, where they established a base to repair their ships and Mobile Suits. In UC 111 it became known, that these Mars Zeon (also called Oldsmobile Army due to their use of outdated mobile suits) had converted Olympus Mons into a giant cannon which they planned to use to attack Earth. As a result the so-called Mars Autonomous Squadron was sent there to defeat the Mars Zeon, a task which they were able to complete."