On the U.S. Map (not the map of the battle), press START to get into the options menu, then go into the Cheat Menu, then enter X, B, A, B, Y.

Your faction will skip all the Civil War battles and go fight the Russians in the Battle of Alaska in the final battle. (Unverified)

Input X, X, A, A, Y to add money to your game account. (Unverified)

Input the following for the territory you want under your control in the in-game cheat menu:

B, X, X, B, B ... Great Plains
B, X, X, B, A ... Great Lakes
B, X, X, B, X ... Dakotas
B, X, X, B, Y ... Central Heartland
B, X, X, A, A ... Northern Texas
B, X, X, A, B ... Southern Texas
B, X, X, A, X ... Arizona Territory
B, X, X, A, Y ... Oklahoma Grasslands
B, X, X, Y, B ... New Mexico
B, X, X, Y, A ... Great Basin
B, X, X, Y, X ... Northern California
B, X, X, Y, Y ... Southern California
B, X, X, X, A ... Arcadia Plains
B, X, X, X, B ... Northern Cascades
B, X, X, X, X ... Southeastern Arcadia
B, X, X, X, Y ... Central cascades