Press SHIFT+ENTER at the same time then type in code of your choice, then press ENTER.

Bring Reinforements ... Reynolds (Union); Hill (Confederate)
Eliminate Stress ... Hancock (Union); Jackson (Confederate)
Fortify Everyone ... Hooker (Union); Longstreet (Confederate)
Computer vs. Computer ... Halleck (Union, Confederate)
Rally Routed Troops ... Sheridan (Union); Lee (Confederate)
Reset Clock to Start Time ... Buford (Union); Stuart (Confederate)
Advance clock To End Time ... Sedgewick (Union); Pickett (Confederate)
See Enemy Battle Plans ... Custer (Union); Harrison (Confederate)