Slitherine

This infomation comes from the PANMARK Yahoo group so I can't claim the credit. They are more interested in Eastern European Warfare - for this period the detail only really goes as far east as Silesia. There is a lot of stuff and it is of mixed usefulness but there are some real gems for our period (and the TYW stuff is right at the top of the PDF index - ECW is later).

http://www.cgsc.edu/carl/nafziger.htm

Regards
Tim