The galaxy is formed by the gravitational collapse of a large cloud of dust and gas. Nearly 10,000 light years in diameter, the galaxy includes over one million inhabited worlds and thousands of intelligent species.

Inside the Worlds of Episode I.
 

 

The Oseon System is created when a rogue star disrupts the formation of a planet and creates the Oseon asteroid belt.

Time Tales.
 

 

The Yavin system is formed.

Star Wars Encyclopedia, via Time Tales.
 

 

An asteroid strikes the planet Vinsoth, destroying most life on the planet. Surviving species evolve into the Chevin.

The Essential Guide to Alien Species.
 

 

Three rivers on the planet Tatooine form what will be known as "Beggar's Canyon".

Star Wars Encyclopedia, via Time Tales.
 

 

Dobido becomes the moon of the planet Sernpidal.

Vector Prime and Time Tales.

 
 

The Columi species develop interstellar space flight and go on to survey a number of neighboring star systems before returning to isolation on Columus.

The New Essential Chronology.



The recorded history of the Sith race begins on Korriban.

Star Wars Encyclopedia; Jedi vs. Sith: The Essential Guide to the Force.

 
 

The Yevethan species, young compared to others in the galaxy, gain sentience on the world of N'Zoth.

Coruscant and the Core Worlds Sourcebook, via Time Tales.

 
 

The Rakatans' Infinite Empire reaches the height of its power. Much of their technology is powered by use of the Force, including the Star Forge, a factory-satellite that can build anything its creators can imagine. It will later be revealed that the Star Forge uses and amplifies the dark side of the Force.

The New Essential Chronology, Star Wars: Knights of the Old Republic website.



A meteor impact on the planet Alderaan wipes out the Killik race. Centuries later, a lake will form in the impact crater. The capitol city of Aldera will be built on that lake.

The Illustrated Star Wars Universe, via Time Tales.

 

The first droids are invented in future Republic space.

The New Essential Guide to Droids.

Coruscant's Taung race controls the planet through conquest, including a great war with the Zhell people. The Taungs were later called Dha Werda Verda, or "The Warriors of Shadow".

Shadows of the Empire Soundtrack. The details of these events are very vague, and could have occurred any time before the formation of the Republic, perhaps even before humans emerged on that planet.
 
 

An unknown alien race builds Centerpoint Station. A group of planets is moved from unknown areas by the station to what will later be known as the Corellian System. The planets -- Corellia, Selonia, Drall, Talus and Tralus -- contain huge planetary repulsors used to move the planets into their orbits.

The Corellian Trilogy.
 
 

Hyperspace travel comes into use.

A Guide to the Star Wars Universe.
 

Human colonists first arrive on Alderaan.

The Illustrated Star Wars Universe, via Time Tales.
 

 

The ancient Nikto discover the M'dweshuu Nova and form the Cult of M'dweshuu, which soon dominates the entire culture.

The Essential Guide to Alien Species.
 
 

The Verpine race colonizes the Roche asteroid field.

Star Wars Encyclopedia, via Time Tales.
 
 

The Vontor Treaty is signed, binding the Klatoonian, Vodran, and Nikto races to the Hutts as permanent slaves.

Galaxy Guide 12: Aliens - Enemies and Allies.
 
 

A group of Morodins colonize the planet Varonat.

Star Wars Adventure Journal #1.
 

 

The Rakatan's Infinite Empire collapses due to a plague that killed billions and the civil war that followed. Those not killed by the virus lose their ability to use the Force. Over the centuries, the Rakata will devolve in barbarism and forget how to use their technology

Knights of the Old Republic; The New Essential Chronology.



The planet Metellos is settled by a sublight colonization vessel, probably from Coruscant.

Coruscant and the Core Worlds Sourcebook, via Time Tales.
 

 

The Verpine race colonizes the Roche asteroid field.

The Essential Guide to Planets and Moons.
 
 

Queen Rana Mas Trehalt is born on the planet Duro.

The Essential Guide to Planets and Moons.
 
 

The planet Kintan is nearly destroyed by a series of civil wars fought among the Nikto races.

Galaxy Guide 12 and Star Wars Adventure Journal, via The Completely Unofficial Star Wars Encyclopedia.
 
 

The tyrant Xim the Despot begins his reign as leader of an empire based on the planet Dellalt.

The Essential Guide to Planets and Moons.
 
 

The Third Battle of Vontor. The conqueror of a vast region of space, Xim the Despot, is overthrown by a group led by Kossak the Hutt.

Han Solo and the Lost Legacy and Time Tales.
 
 

Corellian scientists perfect the Rakatans' hyperdrive, incorporating technology-based workarounds for components that had needed the Force to operate.

The New Essential Chronology; The Essential Guide to Alien Species.
 

 

The Galactic Republic is formed. Its capital is the planet Coruscant. Founding members include Coruscant, Alderaan, Corellia, and Chandrila.

Jedi Knights come into being.

A Guide to the Star Wars Universe; Tales of the Jedi.
 
 

A young student of the Force named Reda Jalooz steals an heirloom of the Kashi monarchy. Months later, Jalooz learns a dark secret about the relic and asks for forgiveness. Coon afterward, a supernova destroys the Kashi system. The cause of the supernova remains unknown.

Star Wars Adventure Journal: "Relic", via Time Tales.
 
 

The planet Kuat is discovered and settled by human aristocrats from ten wealthy shipmaking families. 

Coruscant and the Core Worlds Sourcebook.
 
 

A group of Duros colonists settle on the planet Neimoidia. Over thousands of years of evolutionary change, Neimoidians come to be considered a separate race from the Duros.

The Essential Guide to Alien Species.

Many of the galaxy's first starship manufacturing companies are founded, including Alderaan Royal Engineers, Core Galaxy Systems, Corellian Engineering Corporation and Rendili StarDrive.

The Essential Guide to Vehicles and Vessels.
 

 

The planet Nubia is first settled.

Coruscant and the Core Worlds Sourcebook.
 

 

The Republic's Great Manifest Period begins, lasting for three thousand years. In this era, the Republic will extend its territories into what will be known as the Expansion Region.

The New Essential Chronology.



The Etti race unites in opposition to the rule of the Republic.They form a fleet and search for a new world far from the Republic.

Shadows of the Empire Sourcebook, via Time Tales.
 

 

The first of the Alsakan Conflicts erupts. The rebellious leaders of Alsakan will continue to fight the Republic in seventeen separate conflicts over the next several thousand years.

The New Essential Chronology; The New Essential Guide to Characters

 

Rogue Arkanian scientists relocate a group of Xextos from Troiken to a newly-terraformed planet in the Quermian system. After generations of genetic tinkering, the Xextos will be turned into a new species called Quermians.

Alien Anthology, via Time Tales.

 

Sith warlord, King Adas, conquers his home planet.

Tales of the Jedi Companion, via Time Tales.


 

The Anomid race develops hyperspace technology.

Galaxy Guide 12: Aliens – Enemies and Allies.
 

 

The Aqualish (Aquala and Quara) fight a civil war, and an offworld exploratory vessel lands on their world. The two races unite to kill the visitors, while taking their ship intact.

The Essential Guide to Alien Species.
 

The Hutts take over the planet Evocar in the Y'Toub system, displace its citizens, and rename it Nal Hutta. They move their entire civilization to this world, abandoning their homeworld Varl.

The Essential Guide to Alien Species.
 
 

Republic Fleet Systems is formed to design warships to counter the threat of Sith-backed uprisings in the distant corners of the Old Republic.

The Essential Guide to Vehicles and Vessels.
 
 

The planet Dahrtag is settled by a religious order sickened by the way galactic civilizations are merging into each other. The order encourages various cultures to bury their dead there, and Dahrtag becomes known as Necropolis, "City of the Dead".

Alien Anthology, via Time Tales.

 
 

The Sneevel race is discovered by Duros scouts. The Republic introduces them to hyperdrive.

Alien Anthology, via Time Tales.
 

 

The elite Ailon Nova Guard is founded.

Star Wars Adventure Journal #15, via Time Tales.

 
 

Slavery becomes common practice in Twi'lek society.

Platt's Starport Guide.
 
 

The Republic's Pius Dea Period begins, lasting for one thousand years. In this period, the Republic comes under teh control of a theocratic sect, starting with Supreme Chancellor Contispex and continuing with his descendants. These leaders sanction many crusades against rival alien sects, causing rifts between the Core Worlds and the Outer Rim that will last for centuries.

The New Essential Chronology.



Ord Mantell is settled as a Republic military outpost.

The Essential Guide to Planets and Moons.
 
 

The Galactic Museum is built and opened on Coruscant in the heart of Republic City.

Coruscant and the Core Worlds Sourcebook, via Time Tales.


 
The first sightings of the race later known as the Morseerians are reported at the edge of Republic space.

Alien Anthology.

Clan warfare breaks out on the planet Ammuud. The wars are fought between the seven clans from the planet Thokos that colonized Ammuud.

Han Solo's Revenge and the Han Solo and the Corporate Sector Authority Sourcebook, according to The Unofficial Star Wars Encyclopedia.
 
 

A rebellion against the Republic is stopped and the rebels are exiled to the Unknown Regions, where they colonize the planet Adumar.

X-Wing: Starfighters of Adumar.
 
 

The Gran begin their recorded history.

The Essential Guide to Alien Species.
 
 

Under the rule of Queen Rana, Duros scientists develop interstellar flight. They begin to explore the galaxy and build space cities. They establish a colony on Neimoidia.

The Essential Guide to Alien Species.
 
 

The planet New Plympto is discovered by Corellian traders.

Coruscant and the Core Worlds Sourcebook.
 
 

A young warlord named Vall Kumauri seizes control of several dozen star systems in the outlying regions of the Republic. His empire will collapse in a few years.

Cracken's Rebel Operatives, via Time Tales.
 
 

The Ropagu establish the Great Library near the city of Ebyl on Ropagi II.

Twin Stars of Kira, via Time Tales.


 
Republic explorers discover the planet Ryloth.

Geonosis and the Outer Rim Worlds.

The Fortress Barlos is built on the planet Pachi.

Wanted by Cracken, via Time Tales.
 
 

The Republic's Rianitus Period begins, lasting for one thousand years. This era is notable for the 275-year reign of the distinguished Blotus the Hutt.

The New Essential Chronology.



The Tunroth make contact with the Duros. They are soon accepted into the Republic.

Galaxy Guide 12: Aliens – Enemies and Allies.


 

The Republic establishes an outpost on the eastern continent of the planet Malastare, due to the world's positioning along the Hydian Way trade route. The Gran species from Kinyen begin to establish their own settlements. In time, the Gran will dominate the eastern continent and the native Dugs will become second class citizens.

The Essential Guide to Alien Species.
 
 

Elrood is colonized by the Old Republic.

Planets of the Galaxy, Vol. III, via Time Tales.
 
 

Corellian pirates discover the Goroth system.

Goroth - Slave of the Empire, via Time Tales.

 
 

Goroth is inducted into the Galactic Republic.

Goroth - Slave of the Empire, via Time Tales.

 
 

A group of Corellian explorers settle on a planet in the Ishanna sector. Rabaan, the expedition's leader, names the planet after himself.

Star Wars Adventure Journal #9.

 
 

The Second Great Schism, known as the Hundred Years Darkness begins when a group of Dark Jedi use twisted science and technology to create an army of monstrous creatures and start a war with the Republic.

The New Essential Guide to Characters; The New Essential Chronology; "Heritage of the Sith" from Star Wars Insider #88.

The Hundred Years Darkness ends after the Dark Jedi make a final stand on Corbos and are all but wiped out. The survivors flee into the era's uncharted regions of space. Many will come to settle on Korriban, where they will subjugate the native intelligent species, the Sith. They will come to be known as the Dark Lords of the Sith.

The New Essential Chronology; The New Essential Guide to Characters; "Heritage of the Sith" in Star Wars Insider #88.



A Sith library -- Veeshas Tuwan -- is founded on Arkania.

Planets of the Galaxy, Vol. III, via Time Tales.



The Sith Lord Dathka Graush dies and is entombed on the planet Korriban, having established a dynasty that ruled over two-thirds of the planet.

Wizards of the Coast website.

The S'krrr and Rabaanite peoples create "Combat" --a battle-to-the-death between two warriors -- to settle their disputes.

Star Wars Adventure Journal #9, via The Completely Unofficial Star Wars Encyclopedia.
 

 

A Rodian warlord founds the weapons manufacturing company, Rheshalva Interstellar Armaments.

The New Essential Guide to Vehicles and Vessels.


  
The Queen of the Offens is born.

Star Wars Encyclopedia, via Time Tales.


  
Miralukan scouts arrive on their newly chosen homeworld, Alpheridies.

Tales of the Jedi Companion, via Time Tales.
 
 

Tapani sector merchants establish the first leg of what will become the Rimma Trade Route.

The New Essential Guide to Characters.
 

 

Sith Lord Simus is killed in battle by Sith Lord Marka Ragnos. Ragnos gains control of the Sith Empire. Simus secretly cheats death through Sith magic.

Tales of the Jedi: Golden Age of the Sith; The Dark Side Sourcebook.

 
 

Ikree, daughter of King Prrit Qabaq, goes into a self-imposed exile on the planet Nazzri.

Tales of the Jedi Companion, via Time Tales.
 
 

The symbol of the Republic Navy is carved into the surface of the Carida military academy's moon.

Dark Empire Sourcebook, via Time Tales.