Mars

Mars is a planet that orbits Sol, notable for being the first non-terrestrial body that Humans set foot on, not counting their own moon, Luna. Mars is about half the size of Earth and has a dusty red hue, and it is often nicknamed The Red Planet by Humans.

Mars was the first planet that Humans considered to have once contained life, and they were right. Mars was once home to an ancient and long-forgotten race known as the Ice Warriors, who lived in the icy catacombs under the planet's surface. However, all of these Warriors died out during a great plague and soon even their catacombs collapsed as the planet aged.

At some point, volcanic activity inside Mars ground to a halt, and Mars was left a dead world. This did not stop another race of aliens from attempting to colonise it. These aliens, who looked a lot like Alpha Centurians, attempted to populate the planet but were soon driven away by the harsh conditions.

Mars was terraformed on 22nd July 2597, but only on the inside, so the outside of the planet remained barren and red for many years to come. This was intentional as Humans wanted to keep the Red Planet as it was, however, it soon became apparent that population increase dictated action. At some point, large structures were built on Mars to accomodate the growing Human population.

Mars was officially deemed destroyed along with Earth, Venus and Mercury in 5,670,778,997 PLF (i.e. 78,997 Post Common League) when Sol finally went supernova. Humans had long since abandoned the planet.