Somewhere far beyond: the battle of Prairie Grove
It is the second entry in the system premiered several years ago by the well-received Innocence Lost: First Bull Run.
Pastrengo, Enemy Mine
(the Wars of Rome against Parthia)
Thy kingdom come (the making of the state of Israel in the time of Saul, David and Solomon)
Soul of the Braves (the epic of the Alamo)
The Battle of Ayryn Woods (a free fantasy game adapting the Battles of the Middle Ages system to a fictional setting)
The first entry in the Thirty Years War battles series (the natural evolution of the ECW very well received system - probably the first battle depicted will be Dessau or possibly White Mountain).