It shouldn't, but unfortunately it does.
I just had my CK2 update today, new patch? Hopefully it's fixed.
I just had my CK2 update today, new patch? Hopefully it's fixed.
I don't believe there is anything to fix here. If you DoW a nation/dynasty that has an exisiting army in the field, no matter what its make up, you can't expect that the AI should disband the army because you believe its not fair. It would be like saying that the AI hiring merceneries isn't fair either and needs fixing too.
Am having a break from CK2 at the moment until this and the other niggling issues get resolved, but still:
1. An attached Army from an ally not at war with an aggressor should help defend it's ally if attacked by an aggressor. At this point, the ally should have to make a decision to join in against the aggressor or not. If not, all subsequent actions against/by aggressor will not involve ally. If yes, then ally is added to aggressor's war and the two allied sides can now do what they want.
2. Until the aggressor attacks the combined stack, attached armies not at war with the aggressor will not be involved in any offensive actions against the aggressor, this to work in a similar way to Holy Orders vs same faith opponents.