A corps was a large infantry unit. In the Galactic Republic's Grand Army, a corps consisted of 36,864 clone troopers and was led by a Clone Marshal Commander and Jedi General. Each corps was divided into sixteen smaller divisions known as regiments, each led by a clone commander. During the First Battle of Geonosis, the Republic deployed eight corps of troopers to the planet.
The word "corps" also applied to naval units such as the Logistics corps, the Transport Corps, and many others. The word "corps" could also apply to army branches such as the Army Air Corps and Imperial Artillery Corps. The term was also used in less military organizations such as the Imperial Survey Corps A Starfighter Corps was an entire sub-category of military units of starfighters.