How bad is starving?

[Lazy_Perfectionist]

Starving is -4 morale instantly. Disease takes a while to kick in. When defending a fortress, starvation can be quite nasty. For both the attacker and defender. When raiding, especially with a disposable force, starvation isn't really a concern, even if its happening.

Starving troops will break and run very quickly. It's kind of hard to cull the herd in that case. But you won't be starving cause your army will be scattered around several provinces.