Sentence:  For being <WSD>Confiners</WSD> on the "Aetolians", and vsing the same manner of arming, it was thought it would bee a matter of great vtility in the Warre, to haue them in their Armie; for that they knew their manner of fight, and were acquainted with the Country. 
Meaning of the word marked with <WSD> tags:  A person who lives on the confines, boundary or edge; a neighbour.