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Cannonball Tanks were large double-barrel tanks, found on planet Batalia.
Cannonball Tanks were big and green, with a giant cannonball launcher atop them.
They normally fought alone, but occasionally, they appeared in groups of two. At defeat, their cannonball launcher would explode, and the rest of the tank would continue to move and then eventually explode.
The Cannonball Tanks patrolled the ground of Batala, while the Blarg Battleships patrolled its sky.