ORBAT
this was an acronym used by the officers of the Grand Army of the Republic to describe the orders of battle, which defined the arrangement of forces within the GAR. There were two distinct ORBATs employed by the Grand Army, one for regular forces and one for special forces. The regular army ORBAT remained virtually unchanged throughout the Clone Wars, but the special forces ORBAT was adapted to meet the changing needs of the battle against the Separatists. The regular army ORBAT originated with the Grand Army itself, and was broken down into ten Systems Armies, twenty Sector Armies, eighty corps, 320 legions, 1,280 legions, and 5,120 regiments. Each regiment was broken into four companies, each of which had four platoons, which were divided into four squads of nine troopers led by a Sergeant. The special forces ORBAT was much simpler, with the Special Operations Brigade being formed into ten battalions, 100 commando groups, and 500 companies. Each company was made up of 100 troopers divided into five troops. Each troop then had five squads of four men. Thus, at the height of the conflict between the Republic and the Separatists, the Special Operations Brigade contained 50,000 troopers, while the GAR consisted of nearly 3,000,000 soldiers.