Offering peace deals that cost half of your current warscore. Like you have 50% warscore on someone. Peace deals that cost 25% or less warscore will result in stabhits. Although I think they removed it against AI.What are the rules for stabhits in peacedeals?
Did you click on the unit stack that siege? It will open the siege screen and will see the progress. If you see a ! besides the yellow bar (I think you mean the morale bar) it means you don't have enough units for the siege.So When I declare war on another nation, I choose to conquer the capital (imperialism) and take my troops to the capital and leave it with yellow lines.
It won't let me capture it or I don't know how to do it.
For example, im the otomans and i want to conquest the whole bizantine empire, so my objective is to take his capital, when i leave my troops on his capital it turns with yellow lines and stay like that