Battalion Wars, released as Assault!! Famicom Wars in Japan, is a 2005 real-time tactics game developed by Kuju London and published by Nintendo for the GameCube. The player controls a vast array of units ranging from infantry, armoured divisions and aircraft, completing missions through a mixture of unit management and strategic planning. In the game's story, the player operates as a commander of a battalion, who initially take part in a conflict between two nations that culminates in an eventual alliance between them, in response to a surprise attack by a third nation.

The game received generally favorable reviews upon release, and led to the creation of a sequel, entitled Battalion Wars 2, for the Wii in 2007.