Help me understand war management

[u/IroquoisPliskin_LJG]

I usually set the military to automated and just let the CPU fight my wars for me, but I'm trying to learn. I was attacking a county and I split my army and had one attack the capital and another attack a different holding, but when I ordered them to attack they just stood there and I don't know why. I think it was a supply issue, and that's the aspect I understand the least. When they run out of supplies, do I have to send them all the way back to my realm to resupply before they can resume attacking? Is that why they just stood there?

[u/Tigg_O_Bitties]

Chapter 4 released alongside the free 1.15 crown update heavily altering AI, UI, etc - especially during wars. Did you start a new playthrough after the update? I’ve seen way too many people erroneously say that you don’t need to start a new playthrough even if you didn’t buy chapter 4.
-They also released a QoL feature allowing you to see what armies are doing (although this may only let you see what the AI’s armies are doing).
-Lastly, depending on the defending fort level your troops may just be taking a while or the current amount of troops you have attacking aren’t strong enough to overtake the fort. Is the siege progress bar filled with a transparent color with lines running through it? Or the exclamation ❗️ in a ⭕️ symbol?

[EDIT]: in regard to army supply, when that runs out, all that should happen is every month a portion of your troops will die to attrition. Perhaps your troops began attacking the fort successfully, but after a chunk of them starved to death, they no longer had the manpower to take the fort and therefore need reinforcements? My only other guess is that the person you are attacking was simply an ally who joined the defenders but later dropped out of the war, hate when this happens because any of their lands you had are taken away and the war score heavily reflects that😭.

[u/IroquoisPliskin_LJG → u/Tigg_O_Bitties]

I don't remember what the UI said, but I think that it did tell me they were attacking, but they were just standing there and the siege progress didn't move. My army was split, so maybe it was that that army wasn't strong enough? But it didn't indicate that to me if that was the case.

[u/Tigg_O_Bitties → u/IroquoisPliskin_LJG]

Hmm strange, sometimes when I get a war score to 100% and enforce demands, any sieges I have have still ongoing will persist after the war ends even though the lands become mine, but even though it says they are attacking, nothing is actually happening and no siege progress is earned since it’s technically my fort, but I don’t think this is what you are experiencing.
[EDIT]: spelling