
The Marching Optios
In the Roman Legions an 'Optio' held a rank in each 'Century' similar to that of an Executive Officer. The main function of these soldiers in battle was to be stationed at the rear of the ranks and keep the troops in order.
Among their other duties were to enforce the orders of the Centurion and / or take over command of the Century in battle should the need arise plus other administrative duties while in camp or on the march.
As an interesting side note, Optio pay was double the standard Legionary payment. Optios were also the most likely candidates to be promoted to 'Centurion' if that appointment became vacant.