Anyways, since I made the thread I might as well contribute to it first. Since I myself have trouble writing narratives, I figured I could write an article in the style of Abel G. Pena's Hyperspace articles. Let's get started.
The Crimson Robes - The Emperor's Royal Guard
Despite popular conception, the Imperial Royal Guard's origins predates the establishment of the New Order itself, and was also intertwined with the Banite Sith Order. Forming out of a rebellion against Echani Command in 1153 BBY, the Thyrsians would fight against the Six Sisters (along with Begali). For centuries the Thyrsian people would wage war against the Echani for their independence. The rebel special forces became known as the Sun Guard, and fought several times against the Echani, until the Pact of Almera recognized Thyrsus's independence and the war concluded. The men of the Sun Guard, most of whom had been fighting for most of their lives, found themselves lost and out of work so many turned to mercenary work. They became bounty hunters, gladiators and guns for hire, eventually becoming rivals with the Mandalorians, developing a rivalry through many skirmishes. The most famous of these skirmishes came in 402 BBY, when the two groups were hired by rival claimants to Sintheti's Horned Throne and fiercely fought each other for three years. Stellar Legionnaires in heavy black armor and wielding their revered Thyrsian Pikes would fight in the cramped catacombs against dangerous Mandalorian warriors clad in beskar'gam fueling the groups hatred for one another.
Over the centuries the Sun Guard would become obsessed with prophecy, that the galaxies salvation would lie in the "the son of suns". Attracting the attention of the Sith Lord Darth Plagueis, the Guard were hired to serve as guards to the Dark Lord's private retreat on Sojourn and began turning into a Sith-aligned cult. Eventually, Darth Sidious later orchestrated the ascension of Thull Wulain to the position of Supreme Sun Guardian (the highest position of the guard), who then swore allegiance to Sidious. Using them as his own personal guard and assassins, they were involved in covert operations, eliminating senators, obtaining Sith artifacts, and guarding his Coruscant lair during his bid for power. They also served as occasional sparring partners for Sidious's apprentice, Darth Maul, and some in the Guard were even considered as the prime clone template for the Grand Army of the Republic.
However, despite the upper leadership of the Guard being Sith pawns, their mercenary attitude was still alive at the time of the Clone Wars. Several Sun Guard Legions were employed by the CIS and other clients during the war, such as the 2nd Sun Guard Legion, who were defeated by General Somahol during the Liberation of Wode, while other rogue Sun Guard Legions led a campaign against the rampaging Mystral Shadow Guard, pushing them back to their homeworld, Emberlene, and orbitally bombarding the planet. As the war dragged on and Palpatine's plans began moving to it's final stages, he arranged for his then apprentice Darth Tyrannus to dispatch Asajj Ventress to purge the group's mercenary elements and leaving only those who were strong or loyal to the Dark Lord. Many of the Guard's leadership, who were in on the purge, would survive and make up the top of the power structure of the Royal Guard following the Declaration of the New Order, with Thull Wulain becoming the first Sovereign Protector.
(Part 1 of ???)