"European pre-modern wars consisted of small armies and relatively low civilian casualty ratios." I don't think the Napoleonic wars of early 17th century can be considered small armies. French Empire had around 1.2 million regulars in 1813.
I don't think most people would consider them pre modern either.
https://en.wikipedia.org/wiki/Modernity
I don't think most people would consider them pre modern either.