Poseidon

Poseidon is the second largest space colony, and is paired with its sister city, Serenity. It is located in the Posidonius crater.

History
Originally little more than a glorified barracks, Poseidon was created as a home for the staff needed to see to the guests staying in Serenity. The two cities suffered from extreme income inequality: Serenity was an opulent playground for Earth's wealthy, while Poseidon was barely allowing subsistence living for the employees. Too poor to stay, and too poor to leave, many of Poseidon's residents became a form of indentured servant, owing whichever company they worked for more than they would ever be paid.

In 2101, tensions boiled over, and the citizens of Poseidon, led by Se To-Bao, took the citizens of Serenity hostage, leading to Luna's War.

In 2105, the citizens of Serenity and Poseidon signed the Treaty of Tranquillitatis, ending the conflict.