The Galactic Republic and it star systems shared sovereignty, and spanned a multiplicity of worlds from the Core Worlds to the Outer Rim Territories, uniting a variety of sentient species, human and alien alike, under one banner.
― Star Wars Fandom
The Republic military was comprised of a clone army bred on Kamino through proprietary Kaminoan cloning facilities using the bounty hunter, Jango Fett, as a template. Clone troopers fulfilled various functions in every branch of the Republic Military, from infantry soldiers, navigation officers and starfighter pilots, to the elite ARC troopers and clone commandos. It is important to note that not all service members within the Grand Army were clones.