General Chaos Cheats

To access the game's secret mode, plug in both controllers. Pause the game and hold down buttons A and B on controller 1, and button C on controller 2.
Once this code has been registered, you can go to the next battle, war or get maximum medics as follows.

To execute battle advance, hold down buttons a, c and press up on controller 1, and button b on controller 2.

To execute war advance, hold down buttons a, c and press down on controller 1 and press the b button on controller 2.

To get Maximum Medics, press buttons a and c on controller 1 and button b on controller 2.