There are several guides online on how to win the various historical battles.
The Battle of Brandywine Creek (1777)
The Battle of Rossbach (1757)
The Battle of Lagos (1759)
The Battle of Fontenoy (1745)
The Battle of Porto Novo (1759)
Apparently there are also mods for battles, as the first video shows the Battle of Poltava (1709) and the Battle of Lesnaya (1709).Read more >