The heavy assault unit, Physalis, was designed as a beefy, high-powered fortress buster - and for that purpose, it was armed with a mighty bazooka loaded with a forbidden weapon, a Mk. 82 nuclear warhead.
The unit was stolen and used by Zeon ace Anavel Gato, who succeeded in firing the nuke at Solomon and display to the world that the Federation would dare violate the Antarctic Treaty.
