Stolen territory is territory owned by one faction, but another claims as their own. It causes the kings to snarl and bicker over ownership, this is mostly hidden from the player and isn't a huge factor to the gameplay. However, recovering lost territory is the most common reason a kingdom starts a war with another kingdom. For example, Curaw is owned by the Kingdom of Vaegirs but claimed by the Khergit Khanate. Fortifications are claimed by factions as rightfully theirs if one of these factors apply: * they were the prior owners * belonged to them at game start