Fiction:Delpha Coalition of Planets/Space colonization

DCP Dimensional portal and Dyson Shells
The portal works by using a Dyson shells to orbit a star, which collects its energy output into giant lasers, that focus onto a single point. The region of spacetime becomes so hot that it begins to "burn" and blows up wormholes into other universes and realities. Superstrings are twisted around a higher dimensional brane inside the wormhole.
 * Task:A portal to other dimensions and universes
 * Size:10,000 meters wide
 * Weapons/defenses:Lock down sequence
 * Tools:Scan, extra-dimensional portal
 * Significant events:Allowing safe passage for citizens during the Scourge to Universe 66501 and Warlord Tricarrion's invasion.

Stellar engine
The Stellar engine is a collection of stars 5 AU in diameter (thats 464,779,438 miles) about the distance between Jupiter and the sun! It creates a tremendous web of energy, capable of folding, tearing and altering the fabric of spacetime. It is also a giant starship capable of harnessing the power of the stars to create a giant wormhole. This is also the DCP's greatest weapon, for if this ship is detonated, it could create unimaginable destruction (and will cause a supermassive black hole and damage to subspace). It was constructed by gathering a cluster of stars gravitationally. Then, dyson bubbles were used to collect the energy and project it into generators and vast beams of pure energy (bent by the stars magnetic fields). It is one of the biggest known artificial structures known in existence.
 * Task:A giant starship, artificial world, spacetime manipulation, huge star buster, other classified purposes. In the future a Matrioshka brain.
 * Size:5 Astronomical Units in diameter (464,779,438 miles).
 * Weapons/defenses:Colossal energies, multiple star buster.
 * Tools:Various.
 * Significant events:The War of Ages, sometime in the future an intelligent species evolves in a Stellar engine megastructure, and their entire culture and knowledge revolves around the ship. They are known in the future as the Hafvor.
 * Notes:I based this on the real-life concept of Stellar engines.

World Star
The biggest structure ever created by the DCP is World Star. So large is this ship, it is classified as a artificial world. Its main task is a shining beacon in the great voids inbetween the local group of galaxies. The megastructure is a Globus Cassus. Before entering a different galaxy, ships must visit World Star for check ins, to stop trans-galactic diseases.
 * Task:Commerce and The Milky Way's road to the local group of galaxies
 * Size:50,000 miles in diameter
 * Weapons/Tools:Various
 * Tools:Tractor beams, scan, teleporters
 * Significant events:

Colonization of space
It is a need for most civilizations to expand, whether it be through diplomacy or force, in order to survive, expand, gather resources and flourish. Eventually, living on one planet alone can get very dangerous, so civilizations often expand into space.

History
The DCP has had two major expansion periods:
 * 1) Conquering of the Delpha Sector - Which took 80 years during the Empire Era.
 * 2) Great Expansion - The 100 years rise to dominance in the Milky Way after the defeat of the Grox during the Golden Age Era.

Space colonies
The DCP has over 2.5 million systems under its control, to prevent unrest, most of them are ruled under an iron first, or there must be a massive war to unite them all. Warlords now take control of the major sectors. Not all colonies are Grimbolsaurian (although members often intermix, if they can both survive in the same enviroment), and while ruled by an iron fist in the inner sectors, the outer ones have greater diversity is society and culture. Colonies that rebel are quickly crushed. Colonies on the inner worlds are extremely rich and use their bountifuul resources and trade, however, the far reaching worlds that cannot sustain themselves use replicators to create products. Most planets are terraformed.
 * Delpha Worlds - No real difference between this one and the one below. The Delpha Sector is the strongest protected region.  Most invasions fail.  Mirenton, and the founding species homeworlds reside there.
 * Bountiful Inner Worlds - Usually deep into DCP territories, include homeworlds and other major planets and sights of interest. Self sustaining, typical populations into the tens of billions.
 * Territory worlds - Include colonies that lie outside the Bountiful, rich worlds. Self sustaining, nearly all terraformed.  Population ranges from 2 to 10 billion.
 * Expansion Territories - Include systems clustered quite close to each other or allied territory. Colonists are in the millions.  Not all are terraformed, and some are poor, or even build their own rules and regulations.  Things steadily improve, as they are Expansion colonies after all.
 * Borderline/Outer/Deep space colonies - These planets are either very far and very poor planets. May include just a handful up to a few thousand colonists at the most.  Some of these are research colonies or military installations (the latter of which are richer).