Complex sentence: Founded around A.D.90, probably to house an Auxiliary cohort of around 500 men; the fort's purpose, like others of its size in the area, was to police the local population and control communications through the Llugwy valley.
Split into simpler sentences: Founded around A.D.90, probably to house an Auxiliary cohort of around 500 men. The fort's purpose, like others of its size in the area, was to police the local population and control communications through the Llugwy valley.