How would ironclad warfare develop in a timeline without the American Civil War (or with a much shorter war in which the alt-CSA never gets hold of ironclads, so there's no ironclad warfare in it, it comes to the same thing) ?
IIRC, before the ACW, the biggest example of ironclad warfare was the Austro-Italian War, which still focused on ramming as the main means of attack. But those members who know more about this topic can say more...how would naval strategies develop in such a TL?