This Datacron unlocks the codex entry - Galactic History 67: Mandalore the Ultimate
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 Mandalorians had suffered not only defeat but humiliation in the Great Sith War. After their leader, Mandalore the Indomitable, crash-landed on Dxun and was devoured by wild beasts at the war's end, a new warrior rose to take his place, later called "Mandalore the Ultimate."
Deciding to bring in new blood, Mandalore opened the ranks of the Mandalorian Crusaders--once dominated by the followers of the ancient Taung, now fielding alien recruits. Calling themselves Neo-Crusaders, these warriors adopted traditional Mandalorian armor and training. Mandalore established a base on Dxun, testing his warriors against Dxun's infamous predators.
As their ranks grew, the Neo-Crusaders began to conquer worlds weakened in the Great Sith War. Later Jedi would believe Sith influences propelled the Mandalorians into war, but the Mandalorians themselves claimed to be driven only by the chance for conquest and revenge.
To retrieve this Datacron you will first need to go to The Star of Coruscant in the southeastern section of the Starship Graveyard (Screenshots 1 & 2). Go inside the Star of Coruscant and make your way to the elevator that takes you up to the second floor. Just follow the ship's halls, you'll see the elevator in no time. Take the elevator up and make your way over to the southern end of the room (Screenshots 3 & 4). Here you will need to jump onto the crate right in front of me and then onto the larger crate to the right.
From the top of this crate you will want to jump onto the little fork lift right in front of you (Screenshot 5). From here the next few jumps are obvious. From the fork lift to the crate, atop the crate on this crate over to the other crate then from that crate onto the crate ontop of it so you can make it to the crate above that crate ontop the previous crate (DID I CONFUSE YOU? IT WAS MY INTENTION!!) Look where I am in (Screenshot 6) that's where you will want to be now, it's pretty obvious how to get here.
From this crate you will want to continue west to the little ledge I am looking at in (Screenshot 7). Follow this ledge around to the crate to the north and jump down to it. Once you're here wait for the crate that moves across the room to come to you (Screenshot 8). Ride the crate all the way across the room and jump to the crate to the north that it takes you to (Screenshot 9). Once you're here you will want to climb up as high as you can and wait for the next moving crate (Screenshot 10). Jump onboard and ride it all the way until you come to the final moving crate. Make this last jump and than there is only one more jump before the Datacron (Screenshot 11).