(02-04-2016, 04:07 PM)LonginusXXI Wrote: I am talking 1st century A.D.
No standard size. Not in the 1st century.
Every group of soldiers between 20 and 2000+ men could be a vexillatio led by a kind of praepositus. The term vexillatio could be used for any kind of detachement of any purpose.
I guess you are asking for the vexillatio a Legatus Augusti pro Praetore and commander of an exercitus provinciae usually sent to the emperors campaigning army. The answer is pretty simple: As many units as the emperor ordered to send. Furthermore, in the 1st century the romans prefered to move entire legions plus auxilia and not parts of legions plus auxilia.
Ut desint vires, tamen est laudanda voluntas
