In-game Reset
Hold Start + Select during game play to return to the main menu.
Original Artwork
To unlock the original character artwork in the archives section, complete Empire mode with certain characters in your employ. Save the game history after the credits, and the art can now be seen.
Easy Officier Defeat
This is a very useful tip for thining out the opposing army's troops, when an enemy officier is in a "blue" area and you kill him, he will leave for the rest of the game, and so will all their troops. Example, if there are 3 strongholds and the 2 outer ones are blue and the officier is somewhere in between them, he is on the "blue area". The same thing applies for your officiers, if they are in a red area and are killed they will leave for the rest of the game.