SWTOR Ilum Yellow Matrix Shard Location Guide

The Green Matrix Shards are remnant relics of the Infinite Empire and no longer useful. Once they were used to create your first relics at the game's launch. Now it's simply part of the Datacron Master Achievement along with codex: Galactic History 86: The Empire's Revenge. There are 5 Datacrons in total located on the planet of Ilum.

Datacrons are collectables scattered around the galaxy in Star Wars: The Old Republic. Each Datacron contributes towards your Legacy's passive stats permanently. Furthermore, they also provide interesting Lore and Codex Entries about the Old Republic era.

Starting coordinates: 310, -402.

The Yellow Matrix Shard is located right outside the Imperial Base Camp in a small building near the outer guards. If you go for this on a Republic Character, I recommend using one with stealth.

This will grant you a Red Matrix Shard, which is no longer useful, but is simply part of the Legacy achievement towards Datacron Master, along with the codex: Galactic History 86: The Empire's Revenge.

This datacron holds unheard of power and knowledge collected by an ancient race. You access its power and discover writings which are clearly only one small piece of a massive galactic history:

The Republic had enjoyed three hundred years of peace, knowing nothing of the Sith Empire's continued existence on Dromund Kaas. When strange battle cruisers were reported in the Tingel Arm, the Republic sent a diplomatic vessel that was annihilated after sending a frantic transmission. As the Republic and Jedi began to investigate these mysterious newcomers, a massive Imperial battle fleet descended on Korriban, triumphantly reclaiming the Sith holy world for the Empire.

Imperial fleets converged on targets in the Outer Rim, devastating key military outposts. Planetary governments corrupted by secret Imperial agents suddenly revealed their allegiance to the Sith. No one knew how powerful this reborn Sith Empire was, how large it had grown during the past millennium or where its capital was located.

The Republic was thrown into chaos. Disagreements in the Senate and the defection of key systems delayed its military response, while the Imperial forces coolly carried out the Emperor's plans. Despite several important victories--most notably at Bothawui--the Republic was forced onto a defensive footing. The first stage of the Emperor's plan was a success.