Structure
A full legion consists of 5,000 rank and file and several officers.
A legion is divided into 10 cohorts of 500.
Each cohort is divided into 5 centuria led by a centurion.
Each centuria is also divided into 10 decuria led by a decurion.
Senior Officers
The senior officers of the Legion are not assigned to cohorts. They are responsible for attending war councils and overall administration of the legion. In battle, they go where needed.
Legatus
The overall commander of the legion. Decorated with gold.
First Tribune
Second in command of the legion. Takes command if legatus dies. Decorated with silver and two stripes of gold.
Camp Prefect
Third in command of the legion. In charge of training the legion and commanding the auxiliaries. Decorated with silver and one stripe of gold.
Tribunes
Five tribunes serve as administrative officers. Decorated with silver.
Cohort Officers
These officers are assigned to cohorts and are responsible for leading and maintaining discipline among the legionnaires under them.
Centurions
50 centurions command units of 100 called centuria. Certain centurions also command their respective cohorts. Decorated with bronze.
Primus Pilus
The centurion of the first cohort’s first centuria. In battle, commands the whole cohort. Attends war councils with the senior officers. Decorated with bronze and two stripes of silver.
Pilus Prior
The centurions of the first centuria of each cohort beyond the first. In battle, they command their whole cohort. Decorated with bronze and one stripe of silver.
Optio
Second in command of a centuria. Responsible for enforcing the centurion’s orders and taking command in battle if the centurion falls. Decorated with red and two stripes of bronze.
Decurion
Commands a ten-person decuria. Responsible for maintaining discipline in the decuria. Decorated with red and one stripe of bronze.