5,500 BBY

Tapani sector merchants establish the first leg of what will become the Rimma Trade Route.
The New Essential Guide to Characters.
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5,100 BBY

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.
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5,014 BBY

Ikree, daughter of King Prrit Qabaq, goes into a self-imposed exile on the planet Nazzri.
Tales of the Jedi Companion, via Time Tales.
 
 
 

5,007 BBY

The symbol of the Republic Navy is carved into the surface of the Carida Military Academy's moon.
Dark Empire Sourcebook, via Time Tales.