A real pity we lost the --------- forum, many things were perhaps asked there in the past, but it's all gone !. I don't re-call this information and I've not seen anything in the manual.
A couple of questions about the artillery crews ?.
Do artillery crews take cover behind friendly Infantry when under threat ?.
How many men/models do there have to be, as a minimum, to keep the gun working ?.
Can the crews get killed from friendly musket fire ?.