TooFatLardies produce many excellent rules for 19th Century
wargaming, available either as stand alone products such as
their American Civil War set They Couldn't Hit An Elephant and Kriegspiel,
or as extended articles in the various Summer and Christmas
section of the Vis Lardica site, you will find all the various
19th century wargaming pages that I have produced over the
years, originally appearing on the SirGarnet website, and then
on the Vis Imperica website.