The reapers have returned from dark space. With Earth under attack and the mass relays in a state of chaos from refugees and the councils fleet engaging reaper forces the galaxy is a mess. The outcome is unknown, the warfare is devastating. The galaxy will never be the same.
One of the Hegemony's last research projects before the fall. This is a thanix equipped Siege cruiser. With Technology recovered from the Leviathan of Dis the Batarians were able to fashion their own Thanix Cannon. Luckily the remnants of the Hegemony were able to save several as well as the design. Might come in handy when you have to clear out a new world to settle on.