The Eighty-third Battalion was a unit within the Republic Military that served in the Galactic War with the Sith Empire. When the planet Corellia was invaded by the Empire in 3641 BBY, the battalion was sent under the command of Colonel Brint to aid in the Battle of Corellia. Brint established a base in the Corellian Science Museum in the Axial Park district of Corellia's capital Coronet City, where he worked under the command of the Republic General Var Suthra to aid the Jedi Order and the military's operations on the world.