The ground battles were extremely difficult though, since the Silicoids put their bases in locations mostly inhospitible to the indigenous species of the planets. They were immune to most enviroments, seeing as they did not have to take in oxygen and had extremely thick outer hides.
Eventually though, the ground battles were decided by the intervention of the Majorii Empire. They hard-dropped from space several gigantic 'walker' mechs that stormed the Silicoid bases and wiped them out.
The 12 planets, having seen what they could do began to trade. Formal Alliances sprung up as each one began to be recognised as an official space-nation. In the end, the amount of alliances was such that all the species decided to drop the alliances and merge into a Central governing body, a federation, a Unity of peoples. They made many technological advances, aided by the reverse-engineering of many Silicoid technologies.
The United Established Systems Navy is what protects the UES, and enforces it's borders. The UES now stretches to 18 systems, having colonised a new one and taken 5 from the Silicoids with the help of the Majorii.
The UES Avatar-class Battleship. This Blueprint's Designation: Freedom, UESN-21751-D.

Equipped with the latest in Electro-static energy containment and absorbtion systems, the Avatar-Class Battleship has more than enough power to have weapons that are 'overcharged' essentially, all it's weapons operate at 115% damage output. The majority of the Avatar's weapon systems are particle accelerators, that can pierce most energy-based shields that enemy warships use. This is because the energy from a laser shot can be dispersed over different sections of a shield. The Particle accelerator can do damage differently. It does it through Kinetic and Explosive force, which means it can halve the effectiveness of many shields, because they do not have dense-enough shield particles.
In addition to this is a special dual-armor-piercing accelarator that can punch through several decks of enemy ships, and can literally blow a hole through a smaller ship like a Destroyer or Cruiser. A quartret of dual-beam-based weapons allow the rear arc to be covered from attack.
The piece de resistance on this ship is the final three weapons. Two thermo-plasmatic cannons on the front can cause a large explosion upon impact with a ship, that can 'resonate' through several decks, causing extreme damage. The final weapon is an energy bolt, made up of extremely dense concentrations of photons that are directed at an enemy ship. It can probably disable a cruiser outright, if aimed well.
The engine configuation can seem weird to some people, but it allows stability and destination accuracy as well as additional turning power in the case of a capital-to-capital dogfight.
Sorry about the wall of text. If you want me to edit it out and put it into the Galactic Databank section, I will do upon a mod's request.
C&C needed for this, and the other ships that are to come.