Attack area

[USS Providence 1972]

It has been confirmed that:
- Artillery has unlimited ammo
- Muskets and rockets have limited ammo

...so, no, you canno wait for enemy arty to run out of ammo.

Right, and protecting your artillery while trying to put the enemy's artillery out of commission becomes a priority. Horse drawn artillery should become even more valuable than horse archers in RTW. If the enemy has no horse to catch them and they have unlimited ammo, they seem hard if not impossible to beat.