Did you ever consider

instead of closing down boarders and therefore locking in the enemies here to have those outnumbered by encouraging and supporting others to also come? 

Imagine two old buddies meet in a Pub, like two at the French Forigne Legion, and it goes down by the help of a provos native or foreigner relative to a Pub from Aubagne Sleeping Quarters and "I kill you HELP Hey try me" actions.

In all consequences the full 100 yards.