ComCom Mars, 2120 - map

Note: While this is set in the future, the story originates in an alternate history

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Finally, I present the map of Mars, from the ComCom timeline, in the year 2120. By this time, Mars is partially terraformed, with large oceans and seas, many lakes, and a fully active hydrosphere, but still with thiner, less oxygen-rich air than Earth, and a far less developed biosphere. Many upland areas are still bare red/black rock, but the dust dunes are mostly either "fixed" using GM bacteria that create a kind of "desert pavement", or flooded beneath the Great Northern Ocean and the Hellas Sea. The first manned landing was made by the United States of America in 2018, and the first stages of terraformation were begun in the 2040's. The planet got it's first space elevator in 2049, touching down in the settlement of Robinson on the southern edge of the rim of Pavonis Mons, after which settlement and colonisation increased massively.
Every city shown on this map has a population greater than 150,000, and the planet's population density maps show obvious swells around both space elevators (one in Robinson and one in Isidis City).

Mars' part in the Fusion Wars was limited, with actual fighting being limited to skirmishes between the Red and Green factions on the planet. The wars did see the creation of the Tharsis League, however, from city-states that split from the collapsing Confederate Nations Alliance, and the Red-Green wars saw those two cultures come to much greater prominance among Martian society and politics.

Powers of Mars:

Tharsis League: The Tharsis league is arguably the most diverse and second most populous power on Mars. It’s also one of the youngest, having formed from some of the Martian city-states that left the Confederated Nations Alliance. It’s capital city, Robinson, is the third largest on Mars (despite being domed due to it’s altitude), with an estimated population of nearly four million (including transient workers and migrants recently arrived to Mars from the Robinson Space Elevator). Robinson is also the centre of the Ares Alliance. Many of the Tharsis League’s cities were initially settled by the United States of America, and as such represent that in their names (eg. New Washington, New Manhattan).

Grand Canal Union: The GCU is one of Mars’ other great powers, and the most populous. With the planet’s other (and newer) space elevator at Isidis City, the GCU also controls the Grand Canal itself, which links the Great Northern Ocean with the much lower Hellas Sea to the south, connecting the two major commercial areas of the planet (the Northern Rim, and the Hellas Economic Zone). The GCU is a newer collection of cities, mostly developed after the Isidis Space Elevator, and it shows in their intensively planned layout and modern technologies, as opposed to the sprawling and extensive cities of the Tharsis hemisphere (colonised earlier).

Kasei Federation: The Kasei Federation is a series of cities in north-east Tharsis colonised primarily by Japanese refugees, displaced after the takeover of their Earth-bound homeland by the People’s Republic of China. The Federation has a strong cultural identity and a long history, being some of the first to brave the wilderness of Mars when large scale colonisation began. The native Kasei are fiercely independent, and have resisted (sometimes violently) attempts by the Tharsis League and The Greens to push into their traditional lands from the west and south.

The Third Empire: The Third Empire’s Dominions on Mars are unique, in that they are the only Martian lands to still be part of a primarily Earth-based organisation. The lands are split into three Dominions, with capitals at Williamsburg, Greenwich, and New Toronto

The Hellas Community: The Hellas Community represents a wide range of diverse cultures and settlements around the Hellas Sea (formerly the Hellas Basin). The Community was initially founded by Hellas City to resist attempts by the GCU to unduly influence Hellas politics and economics, and to resist attempts to raise taxes from the traffic through the Grand Canal.

The United States of Elysium: The USE is a doggedly independent nation-state located mainly on the island-continent of Elysium. The nation was originally founded during the boom in settlement caused by the construction of the Robinson Space Elevator, and follows an economic and political system loosely based around principles of both the original United States of America, and the Roman Empire. It famously resisted the creation of the Isidis Space Elevator, viewing the construction to be too close to it’s sphere of influence, and the Ares Alliance, viewing it as being an undue influence on the independence of the Martian nations. It has since accepted both.
The USE is also unusual for being the only independent, powerful, Martian monarchy.

The Greens/The Reds: The Greens and The Reds were, until recently just cultural and political groups spread sporadically across Mars. While the Greens have always been more powerful and wealthier than the Reds, the Reds have never been above utilising paramilitary tactics, including the destruction of terraforming equipment in their early years. Since the Fusion Wars, the Reds and Greens have both come far more to the forefront in Martian culture, and have been recognised by the other Martian powers as real nation-entities, and accepted into the Ares Alliance.
The Greens origins lie in the early scientists and engineers responsible for the start of Martian terraforming, and today still operate many of the active terraforming projects. They pursue a policy of the rapid completion of terraforming, often far more rapid than the other powers of Mars would be comfortable with. What could be called the “fringes” of the Greens even advocate the nuclear bombing of the Martian polar ice, to melt the water-ice there and use the radioactive heat to warm the planet further.
It is in response to those more extreme edges of the Greens which the Reds arose. Initially starting in the Northern Desert (before it was swamped by the ocean) the early Reds often destroyed pumping platforms responsible for flooding the deserts, with no qualms about killing engineers and scientists involved in the terraforming projects. The Reds today have become closer to a mainstream political party, with much of their number having demilitarised. One of their greatest peaceful accomplishments was moderating the flooding of the Agyre Basin, keeping much of the basin floor dry and restricting the waters to one large lake in the northwest. In the past, various groups of the Reds have been accused of using biological or chemical weapons to prevent or delay the spread of Martian fauna and flora, but these accusations have never been proved.

Unaligned/independent: A lot of Mars’ settlements have become or remained independent over the years, some of them changing allegiances (or hands) between the other powers on the world, or those of Earth. Currently just under half of Mars’ population lives in unaligned cities or settlements, making a living for themselves under various cultures and ways of life.