Mars

Early History
Mars, the fourth planet from Sol, is a suspiciously barren planet. Some say that at one time, it could support life. There is Ice on Mars, which must mean that at one point it had liquid water perhaps. However, for whatever reason, its once capability to support life ended when the planet became a barren world of volcanos, duststorms, and cold temperatures.

It does, however, pose the best chance of life in the Human solar system.

Mars was the first planet humans dreamed of living on other then their native soil. It would also be the first dead planet to be made livable.

Mars' Humans
Mars was terraformed in the Golden Age. It was settled by humans from Earth, and quickly developed a unique culture. Most of Mars' plants, trees and animals are there for human benefit, and rarely grow out of human control. The Martians live in wealth and very few are impoverished. Their military is perhaps the most advanced in the human domain, equipped with powered suits and heavy machine guns. Martians are known to be strong and brave.

Mars only has one ocean, after it was terraformed. This ocean, named the Red Sea by its new inhabitants, is where all the cities and civilization thrive around. Similiar to how many imaginative characters in history imagined, the humans there dug canals from the Red Sea to their further out cities.

Phobos and Deimos
Phobos and Deimos, Mars' two moons, appear to be asteroids captured by Mars' gravity. Once it entered as a suitable place to live, the moons became places to test nuclear weapons and generic military arsenal. Its also there for research on technology that isn't intended for war, but may be unsafe. The larger moon, Phobos, is known for having the largest nuclear weapon ever created used there.