Ever since their debut at the Battle of Geonosis, the 327th Star Corps has arguably remained the most active division in the whole of the Grand Army of the Republic. Under the control of General Aayla Secura and Clone Marshal Commander Bly, the 327th was the spearhead of the Outer Rim Sector Army during the latter days of the Clone Wars. As a result, only a handful of 327th troopers ever set foot in the Core. They saw action on such diverse worlds as New Holstice, Anzat, Dromund Kaas, and Honoghr, just to name a few. As a result of Commander Bly's ARC trooper training, his closest lieutenents were allowed to don kamas and command pauldrons to signify their rank.
The division's leaders, Bly and Aayla Secura, forged a close relationship after Secura's near-death encounter with General Grievous on Hypori. This bond, however, was broken when the two were sent to Felucia, that last planet under Commerce Guild control. Yet there was disruption in Bly's trust in Aayla Secura when the Clone Marshal Commander shot Quinlan Vos in the shoulder due to Bly's distrust of the rogue Jedi.
During the battle to capture Commerce Guild Presidente Shu Mai, Bly received Order 66 directly from Supreme Chancellor Palpatine himself. Order 66 identified Aayla as an enemy of the Republic. As Secura scanned the area for droids, Bly and his lieutenents gunned her down.