The Ball is a mass-produced " mobile pod " armed with a recoilless cannon.
These inexpensive vehicles, based on civilian space pods, were created to
provide fire support for the Federation Forces' GM mobile suits in addition to
being a weak offensive force, they are now primarily used by the federation to
build structures. Large numbers of Balls are deployed during the Federation's
assaults on the space fortresses Solomon and A Baoa Qu .