Tres militiae
The tres militiae ("three military posts") was a career progression of the Roman Imperial army for men of the equestrian order.
It developed as an alternative to the cursus honorum of the senatorial order for enabling the social mobility of equestrians and identifying those with the aptitude for administration.
[4] The first of the tres militiae was command as a prefect of a cohors quingenaria, one of approximately 150 auxiliary units of 500 men from the provinces.
[4] An alternative post for the second militia was as auxiliary tribune with a cohors milliaria, one of 30 regiments of a thousand men each.
[4] A man would be in his mid-thirties or older at the conclusion of his tres militiae,[4] which could boost his career in politics or business at home.
* prefect of Cohors I Montanorum in Pannonia ;
* military tribune of Legio II Augusta in Britain ;
* prefect of Ala veterana Gallorum in Egypt [ 1 ]