Megalithic Invader Initiative

Megalithic Invader Initiative (MII in short) is an enormous engineering undertaking run in partial secrecy by United Imperial Republic.

Goals
Its primary goal is to design the largest vessels and battlestations ever seen, which would be capable of defeating even the strongest enemy fleets single-handedly. Those that are considered affordable by the UIR would than be built under the careful eye of MII overseers. MII's secondary goal is to create colony ships used to populate the furthest corners of the galaxy. Intergalactic exploration is considered, too. To wider public it's shown as MII's main and only purpose.

History
Emperor wanted to have in his fleet an invincible  super star destroyer that would dwarf anything his enemies may field, so he started the MII in 310 ABY. One year later Ultra-class Star Destroyer already began taking shape in various schematics. In 315 ABY Emperor was acquainted with final design of the superweapon and gave permission to build the vessel. Construction took 10 years and in 325 ABY MII's first creation began its maiden flight. Shortly after proud engineers were ordered to design something unbelievably more powerful, a dreadful product of warlords wildest dreams...

Achievements
Megalithic Invader Initiative has short, but impressive list of achievements: It's quite possible that MII is developing plans and weapons to effectively defend against Gaian-class Galaxy Destroyer or even destroy it. On a more shameful note, MII has to come up with plans to prevent future incidents similar to the War for the Reactor.
 * designing Ultra Super Star Destroyer (it's rumoured that they only finished and improved designs originating from the Galactic Empire)
 * building Ultra Super Star Destroyer, acquiring resources and laborforce required to do so and overseeing the joint effort of several shipyards and planets
 * designing Galaxium-class Galactic Star Devastator
 * inventing technologies and solutions necessary to build Galaxium-class
 * building small-scale prototypes of various Galaxium-class' components