How it should be!

[yoori]

Non warring tribes won't be able to loose only their main lands, expansion lands(outposts) are conquerable, non waring tribes can't conquer other tribes lands, only defend theirs.
Non warring tribes can still claim free land and have to deffend it against warring tribes.

I made wrong assumption that non warring tribes can't conquer other tribes extension lands, aparently they can.
Though "non safe" zones should be out of reach for them. Also warring might not be a choice, it may be determined on actions as well.