General Zod had ambitions to take over the planet Krypton and had little respect for the Kryptonian Council, and as such was banished to the Phantom Zone. For this reason he survived the planet's destruction.
Having served his term, he currently serves once more in New Krypton's military, of which he is the head.
Zod is a frequent enemy of Superman and of the people of Earth, as, prior to the rebuilding of New Krypton, Zod tried to take over the Earth.
Zod's two allies, known occasionally as the Disciples of Zod, serve him unquestioningly. Their names have changed many times over the years, but they are currently known as Ursa and Non.
There have also been other versions of Zod over the years; some of which from alternate worlds, or false versions of Krypton; Others have more mysterious origins. All of them, however, posess Zod's cold, merciless determination. [Source: wikia]
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