ca 10,000 BBY

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 Han Solo and the Corporate Sector Authority Sourcebook, via The Unofficial Star Wars Encyclopedia.
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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.
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The Gran begin their recorded history.
The Essential Guide to Alien Species.
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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.
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The planet New Plympto is discovered by Corellian traders.
Coruscant and the Core Worlds Sourcebook.
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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.
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The Ropagu establish the Great Library near the city of Ebyl on Ropagi II.
Twin Stars of Kira, via Time Tales.
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Republic explorers discover the planet Ryloth.
Geonosis and the Outer Rim Worlds.
 
 
 
9,997 BBY
The Fortress Barlos is built on the planet Pachi.
Wanted by Cracken, via Time Tales.
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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.
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