From the back of the box:
WORLD WAR III IS IN YOUR HANDS
2020: the world's economic and civil order is shaken by an unprecedented energy crises re-igniting the arms race between the United States of America, Russia and Europe. Pick your side!
Differing from the console and PC version, the DS edition is a turn-based strategy game played on a hex map through the three campaigns. Two players can do battle in local multiplayer, but each must have their own copy of the game.