I'm a long time CK2 player and have a problem fighting another armies or sieging in this game, it seems that big stacks like 30k against 15k or 20k doesnt grant an ''automatic win" even if i use a general.
Same thing happens in an assault phase, i can siege with an army and assault a castle, like 20k against 1k and most of the times i lose.
any help or advice?
A good place to understand the mechanics http://www.eu4wiki.com/Land_warfare
Siege assault should never been done unless the wall's been breached and your infantry (cavalry and artillery doesn't join in assaults) outnumbered the defender at least 10 to 1