Spann Island is the first map in the first three games' War Rooms. The player faces off against Andy when playing in War Room.
In Advance Wars 1 and Advance Wars 2, the city (seen as a base under a tank in the picture) just west of the southern bridge was unoccupied. This caused the map to take around 30 days to beat. In Advance Wars: Dual Strike, this city was made into an Orange Star base. This made the map much easier, and able to be beaten in as low as 11 days.