maximum and minimum engagement distances

[system0fagame]

one thing i've been having trouble with lambs is making sure AI would actually go inside of a town from the outside and keep things close quarters, one thing that stops this is the AI getting a target through several buildings and then trying to shoot him while behind said several buildings, another thing is that it would be nice to have it for any sandstorm or hurricane operations that would require ai to be close to even engage a target.