The majority of strategic activities happens in the home base. The people live here, learn here, do research here, heal here, and produce and compose equipments here. It is also the launch base for all vehicles.
It is humanity's only base on Mars. If you lost your home base, it is immediate game over. It is positioned in a crater, in the middile of the three territories that you own from when the game starts.
The base starts with a number of basic buildings, and you can build more or upgrade them to improve your home base, allowing you to do more and greater things.