The Alliance of Independent Systems represented an interplanetary governing body, led by a Chairman. Warlord to the Chairman of the Alliance of Independent Systems was the title held by Mace Windy.
This organization finds its origins in the initial writings of George Lucas concerning the Star Wars universe, specifically within the Journal of the Whills (Part) I. This journal is an in-universe story penned by Chuiee Two Thorpe from Kissel, who was Mace's padawaan learner.
In the rough draft script, the Jedi were originally in the service of the Emperors until a relatively late point, even though the Galactic Empire was consistently portrayed as an antagonistic force in the final screenplay. The Galactic Republic was a later concept; instead, the existing Empire had deteriorated into a state of decline and moral decay.