My friend and I seem to be playing the game a little differently but we can't see any direct explanation from the rules as to which of us is correct. The problem surrounds gaining strongholds. Each stronghold card shows that it can be gained by either spending gold or through combat strength. Buying a stronghold using gold is pretty straightforward, but the combat option is a little confusing. We both think the combat strength in the bottom right of the card refers to capturing the stronghold through a combat action against your own barracks, but the debate is over using a battle to attack a stronghold in your opponent's barracks.
My friend thinks that because a stronghold in an opponent's barracks is not yet in control by that player, you should be able to capture that stronghold using a battle action. My opinion is that a stronghold in a barracks is still controlled by a player and therefore can't be attacked because siege actions can't target strongholds.
Which of us is correct?