Brigandine: The Legend Of Forsena Codes -

Play as the Esgares Empire:
Press L2 + R1 + Start at the "General Select Screen". The difficulty selection screen will appear without a general being selected. Begin game play to control the Esgares Empire. Note: Press Start + L1 + R2 in the Japanese version of the game.

Hint: Easy experience:
When fighting a very high level enemy, such as Cador, cast "Halo" on the creature you intend to level up, then fight him until his life drops less than 25. Hit as many x as possible for more xp, then finish him off with a level 1 monster. That killer monster will receive enough xp for 10 levels. Upgrading is possible immediately after the battle.

Hint: Upgrades:
Not all upgrades are good, because the Rune cost goes up with it. Instead, train some units to level 20 before you start upgrading them. This way you can hold more units to train (for example: Dragon, Wyvern) Angels are an exception, since they get thrashed flat at non-upgrade, and after Arch-Angel, their next upgrade is 30 to Lucifer, the Fallen Angel.