The rebel space colonies of the Principality of Zeon launch a war of independence against the Earth Federation, using humanoid fighting vehicles called mobile suits to overwhelm the Federation Forces and conquer half of Earth's surface. Months later, the Federation has finally developed its own prototype mobile suits at a remote space colony. But when the colony suffers a Zeon surprise attack, their new weapons fall into the hands of a motley crew of civilians and cadets. Contains episodes 1-21.