 If you liked
Shoukoku no Altair
|
 ...then you might like
Horizon
|
Firstly both are historical for you damn maniacs :P Both talk about a war between tribes and how the main character is the "key" in winning it (duh he's the main character = =). Horizon have more violence and battles than Shokoku no Altair which focus more on strategies.
In short :Stories about how on man changed the course of history.