Similar in spirit to the late, lamented Space:1889 cloudships rules, Aeronef is about Victorian era armored flying gunships. There are some outstanding ships’ logs for the game here.
Blood Bowl is one of Games Workshop’s smaller games, but its been around for as long as I can remember. Here’s a Bloodbowl variant that uses the game to play European "Football" — soccer.
Ancient Battlefields is a set of free wargames rules "with an emphasis on Command and Control". The game is over when the opposing general flees the field.