Guide to the Separatist Droid Army

The Guide to the Separatist Droid Army was a guide book created for the Confederacy of Independent Systems citizens' education on the structure, militias, and heroes of the army, by order of Count Dooku and General Grievous, and made into many copies. It was expanded upon little by little as the Clone Wars progressed, and was found in libraries and bookstores on many Separatist worlds. After the rise of the Empire, most known copies of the book were rounded up and destroyed by Imperial forces with the intention of destroying the legend of the CIS, but the Separatist holdouts that survived the Dark Times and eventually joined the Rebel Alliance preserved some copies, and after the defeat of the Empire, the New Republic and Galactic Alliance opened the book to the public again, in memory of one of the greatest armies ever created, second only to the Imperial Army, and in respect to its more honorable heroes.

Separatist units

 * Neimoidian Gunnery Battalion: The Gunnery Battalion is a unit that serves as personal protectors of high ranking members of the Trade Federation, including Viceroy Nute Gunray and his aide, Rune Haako. They are unusually selfless Neimoidians, less concerned with their own wealth and greed, and more with preserving the lives of those who do like their profits.
 * Gossam Commandos: The Gossam Commandos are the soldiers employed by the Commerce Guild to outfight and outwit the most elite and strongest of clone troopers. They serve in very grueling conditions, becoming very hardened warriors with good knowledge on how to battle in any environment. The Guild Presidente Shu Mai also uses them as her personal bodyguards, and they are plentiful on Separatist worlds like Felucia.
 * Koorivar Fusiliers: The Fusiliers are the best of the best among the organic Separatist military units. Trained extensively to be the roughest and toughest men available by the Corporate Alliance, they serve as bodyguards for Passel Argente and elite warriors with their own command structure much like that of the Republic's Grand Army. Under certain situations, they can even fight many foes with their bare hands.

Separatist militias

 * Quarren Isolation League: The Isolation League uses droids, but it also uses real soldiers, and to great effect. The Quarren warriors are superb fighters, serving as sailors and marines in the droid army, and are always stationed on- or underwater. Their main purposes are to help the CIS fight its battles on watery worlds, and to split from the Mon Calamari.

Behind the scenes
The Guide to the Separatist Droid Army is loosely based off of the real-world article in Star Wars Insider 84, called the Guide to the Grand Army of the Republic.