Mir

The Mir is a Russian Siege Cruiser (bigger than the USS George W. Bush), disguised as a space station used by the Beleninsk Pact as a weaponised spacecraft against the invading Space Coalition forces and later the Immortal Armada.

Mir had a controllable energy particle weapon as its main weapon, and was seen firing at full capacity emitting a light blue beam at a Star Destroyer while at Earth's orbit and over the Eiserne Zitadelle. the Mir fires the beam again at lower strength emitting a light purple beam while fighting alongside the Space Battleship Yamato.