Battalion Wars was originally entitled Advance Wars: Under Fire, but the name was dropped after E3 2003. This would have put it in the Advance Wars series of video games, as well as the Nintendo Wars series of games. However, all of those games are turn-based, whereas this game is a real-time strategy game. [Infos from Wikipedia]
In the early screens and trailer, the graphic style was still not finalized (it had a more “realistic” feeling), the HUD was different and some of the characters (the general on the right) were removed from the final version.
Thanks to Michael Cheek for the contribution!