Mount and Musket Battalion is a multi-player total conversion that tries to accurately represent the time period around the end of the Napoleonic Wars (1812-1815). It has historical factions with accurate units and equipment, including different types of infantry, cavalry and even usable artillery.
Very fun multiplayer mod for those who are looking for a realistic or more historical musket warfare. Organized events within the Mount & Blade community can literally lead to massive 100+ player events in which players will often take the whole Military rank/formations seriously.