Well, it's all nonsense, actually. Let's just say I was unlucky. Of course, the result is still bad because the Iron Golem will probably destroy everything in 3-4 days, and the others will be stronger than me anyway. It's just a state of mild shock – the game gives you 3 days for everything, if an active castle is captured. So, the caravan knows about the Necropolis, the field taverns, and all the other stuff. This is where the genius of the developer should shine through – there should be a message like, "The caravan doesn't have enough time to capture a single castle in 3 days, congratulations on your victory." I'll try to attach a file now.