The history of the empire started on the planet Feltropolis, the empire's first planet, then known as Regelis.
Universe Empire Statistics
Leader: Immortal Emperor Roanis Quintonius Fel
Government Type: Totalitarian
Capital Planet: Feltopia
Owned Galaxies: 1653
Owned Solar Systems: 634,874
Owned Planets: 213,126,564
Currency: IC (Imperial Credit)
Treasury Networth: 359 x 1036 ICs
Military Networth: 209 x 1036 ICs
Population: 51 Decillion
Timeline
Standard Earth years used.
B.F.D. - Before Fel Dynasty
S.F.D. - Start of Fel Dynasty
D.F.D. - During Fel Dynasty
A.F.D. - After Fel Dynasty (Note: This term will not be used for a while.)
Approx. 50,000 B.F.D. - Invention of the hyperdrive on Regelis, followed shortly by the commissioning of the empire's first colony ship. Regelis is named the capitol of the Regelian Empire, ruled by Emperor Forso Regel.
Approx. 49,990 B.F.D. - Colonization of Lysonius (now known as Feltopia).
Approx. 45,000 B.F.D. - First contact with the Kronius civilization, a humanoid race from the planet Saga. Relations start off well, eventually resulting in an alliance.
Approx. 44,000 B.F.D. - First contact with the Val Ordal civilization, an alien race from the planet Valsalus.
Approx. 20,000 B.F.D. - The L.Z.S. (League of the Zukoro Systems) declares war on the Kronius Empire. The Regelian Empire, being an ally of the Kronius Empire, declares war on the L.Z.S.
Approx. 19,000 B.F.D. - The last L.Z.S. planet falls to the Regelian/Kronius Alliance.
6,000 B.F.D. - Assassination of Emperor Harvon Regel. Civil war erupts due to Horvon being heirless. Ending of the Regel Dynasty.
5,980 B.F.D. - Lorenius Villaralo becomes emperor of the Regelian Empire. Beginning of the Villaralo Dynasty.
S.F.D. - After over a thousand years of instability and civil wars, Maximius Fel becomes emperor of the Regelian Empire, renamed the Universe Empire. Renaming of Regelis to Feltropolis. Renaming of Lysonius to Feltopia. The empire's capital is moved to Feltopia. Beginning of the Fel Dynasty.
72 D.F.D. - Kronius Empire becomes extremely corrupt upon Forox Endonis becoming its emperor. Kronius Empire's outlying colonies fall prey to pirates.
75 D.F.D. - Maximius Fel retires as emperor of the Universe Empire. His son, Roanis Quintonius Fel, becomes the emperor of the Universe Empire.
77 D.F.D. - Emperor Roanis Fel begins the Great Expansion, a huge effort to expand the empire. Through the process, the empire meets thousands of other civilizations.
82 D.F.D. - Believed founding of the Free Beings Alliance by Anov Xobal.
100 D.F.D. - Emperor Roanis Quintonius Fel discovers the secret to immortality, renaming his title to Immortal Emperor. He shares the secret only with the empire's highest government officials, Grand Generals and Grand Admirals.
114 D.F.D. - Spread across hundreds of galaxies, the Universe Empire doesn't put a stop to it's alarming expansion. Any civilizations that oppose it are completely annihilated.
123 D.F.D. - Decline of the Kronius Empire due to rebellions believed to have been instigated by the Free Beings Alliance. Size of the empire reduced by 63%.
126 D.F.D. - Anov Xobal is killed over Branthos IV when his flagship, the Free Roamer, is destroyed by a Universe Empire battleship. The Universe Empire begins to conquer the colonies that had defected from the Kronius Empire. Carillo Fondonas becomes the leader of the Free Beings Alliance.
130 D.F.D. - Assassination of Forox Endonis. Fall of the Kronius Empire. The remains of the empire form into states and form the Allied Saga States Federation (A.S.S.F.), which immediately allies itself with the Free Beings Alliance.
132 D.F.D. - Relations become tense between the Universe Empire and the A.S.S.F.
134 D.F.D. - Universe Empire conquers the last of the colonies that had rebelled against the Kronius Empire.
135 D.F.D. - Universe Empire declares war on the A.S.S.F. The Free Beings Alliance declares war on the Universe Empire.
139 D.F.D. - A.S.S.F. surrenders unconditionally to the Universe Empire. The Free Beings Alliance and the Universe Empire form a peace treaty.
140 D.F.D. - The Universe Empire and the Val Ordal Empire declare war on each other, resulting in the start of the Great Intergalactic War.
141 D.F.D. - Nyterius Tiberium, a former apprentice of Roanis Fel, defects from the Universe Empire and becomes the leader of the Free Beings Alliance. Carillo Fondonas retires.
145 D.F.D. - The Universe Empire makes contact with the Terran Federation.
Note: Feel free to share any ideas that you think will make this timeline better.