The pale and ghostly Umbarans are an extremely high tech species who have decided that the Separatists are a more worthy group to follow than the Republic. At one time represented in the Galactic Republic by the devious Mee Deechi, Umbara seceded from the Republic and joined the Separatist cause. Their advanced weaponry proved a great challenge to the clone troopers tasked with conquering Umbara.
Also known as CT-27-5555, Fives trained with Domino Squad on Kamino before being shipped out to the Rishi Moon listening outpost. He survived the Separatist attack on the station there, and was transferred to the 501st Legion alongside his squadmate and fellow survivor, Echo. Fives and Echo were promoted to ARC trooper status after the defense of Kamino from Separatist invaders. He and Echo were later assigned with the difficult mission of freeing Republic prisoners from the daunting Citadel prison installation on Lola Sayu. Though Fives survived that arduous assignment, Echo tragically fell in battle, leaving Fives as the sole survivor of the Domino Squad training squad.
The clone troopers of the 501st Legion are a tight-knit bunch, loyal to the end to their Jedi General, Anakin Skywalker. Jesse was a hard-fighting patriot who proudly wore the cog-shaped symbol of the Galactic Republic on his helmet, and as a large tattoo that covered his face.
"Let me at 'em!" was Hardcase's typical reaction when presented with enemy forces, no matter how overwhelming the odds. Legend has it that his growth chamber sprung a leak during his formation on Kamino, resulting in his characteristic, somewhat aberrant, but nonetheless useful hyperactivity. When the blaster bolts fly, Hardcase loses all sense of self-preservation and returns fire with zeal, determined to wipe out the enemy with repeated sweeps of his rotary laser cannon.
The droid armies of the Separatists relied on a well-protected supply chain made of converted corporate transport vessels. Huge ships, like the barbell-shaped transport craft or the heavily-armed Trade Federation battleships, ferried in reinforcements, power supplies, weaponry and other essential materiel to the front. As more and more worlds took up the banner of the Separatist Alliance to do battle with the Republic, the Confederacy military was bolstered by flesh-and-blood warriors, like the natives of Umbara or Mon Cala.
In the final days of the Republic, the galactic government had grown so huge and corrupt that any attempt at change required radical thinking and extreme actions. Outlying systems that saw no benefit from being part of the Republic despite paying heavy taxes, began to rebel. This undercurrent of disgust towards Coruscant was seized by a charismatic leader, Count Dooku. The former Jedi rallied together these worlds in a Separatist movement that saw the departure of thousands of systems from the Republic. When Dooku's alliance was secretly backed by corporate titans that offered their unlimited droid armies to the cause, the Separatists emerged as a major threat to the Republic, and the galaxy tipped towards full scale war.