The Republic cog. The symbol of a unified galaxy.
The Galactic Republic was the galactic government prior to the establishment of the Galactic Empire in 19 BBY. Although it was commonly known as the Old Republic, this was not so until the establishment of the Empire; its name when it existed was the Galactic Republic, or simply the Republic. Rarely, it was referred to as the First Republic. At times, the term Old Order was used to describe it.
The Chancellor
The Republic, led by a Supreme Chancellor, had a supposedly democratic government that was able to sustain itself for over twenty-five thousand years. It is said that its complete history would "fill a thousand libraries".
Command structure of regular forces
- Grand Army—10 systems armies, a total of over 3,000,000 units, with Supreme Chancellor Palpatine as commander-in-chief.
- Systems Army—2 Sector Armies (294,912 troops) led by a High Jedi General.
- Sector Army—4 corps (147,456 troops) led by a Senior Jedi General.
- Corps—4 legions (36,864 troops) led by a clone marshal commander and a Jedi General.
- Legion/Brigade—4 regiments (9,216 troops) led by a senior clone commander and a Jedi General.
- Regiment—4 battalions (2,304 troops) led by a clone trooper commander, clone regimental commander, and a Jedi Commander.
- Battalion—4 companies (576 troops) led by a major.
- Company—4 platoons (144 troops) led by a captain.
- Platoon—4 squads (36 troops) led by a lieutenant.
- Squad—9 soldiers led by a sergeant.
From wikipedia. Read about it here.