Ah yes I have to add that. If you can't attack, and exhausted all ways to draw more cards or don't want to overbid, you lose the conflict and concede the stakes.
Don't forget to overbid to get more cards if you are ready to move the conflict to another area (from any to any other not already played).
You can also attack with only 1 card but it's something that should maybe be restricted to when it's your last card.