Cheat mode:
Press [Shift] + [Enter], type one of the following codes, then press [Enter] to activate the corresponding cheat function. Note: Codes are interpreted as commands by the game. Select a superior commander before entering a code to reduce the amount clean-up needed. Cheats may not be enabled in multiplayer mode.

Effect	Union	Confederate
AI vs. AI1	halleck	halleck
Reset clock to start time2	buford	stuart
Fortify everyone	hooker	longstreet
Eliminate all stress	hancock	jackson
Increase experience	mcclellan	beauregard
Advance clock to end times	edgwick	pickett
Bring up all reinforcements	reynold	shill
Rally all routed troops	sheridan	lee
See enemy order of battle	custer	harrison
See all troops	warren	hotchkiss

1. Try watching the AI play itself to get hints on how to win a scenario.
2. Select the "Return To Scenario" option and use this code to resume a battle after time runs out.