One of the biggest improvements made by "Battalion Wars 2" was the inclusion of multiplayer modes, a feature absent in the previous game. Multiplayer offered three online modes for two players to take part in, via Nintento's Wi-Fi Connection - Skirmish, Assault, and Co-operative. In Skirmish, players could start out with a pre-deployed force, and win by earning as many points as possible from destroying enemy units within a specified time limit, with Facilities available that could be used to respawn units as long as they remained in a player's control. In Assault mode, one player could command a siege battalion and win by destroying the opposing player's assets, with the latter winning by defending against this. In Co-operative mode, both players could tackle a battalion controlled by an AI opponent, in which each player was assigned a certain role(s) (i.e. anti-air), forcing each to rely on the other to counter units they couldn't deal with.