How to restrict the range of enemy aircraft?

How can I restrict the range of enemy aircraft? I set up an anchor area, but enemy planes still don’t fly according to my restrictions

i suggest to use fightInArea instead of AnchorArea/Target

Thank you for your answer, but I have also tried fightInArea, but AI still exceeds my restricted area

How many fighters did you get?
Anyway, I would just check if fighter in area, if so attack player or else move to area