The Battle of Earth was the climatic battle that started the Butlerian Jihad. The battle was a result of Serena Butler, Vorian Atreides, and Iblis Ginjo's return to Salusa Secundus after their escape from Erasmus on Earth. Upon their return the League of Nobles learned of the death of Manion the Innocent at the hands of Erasmus and how that sparked the slave revolt led by Iblis.
Serena made her plea that victory over the Thinking Machines was the only way to ensure humanity's survival. With the help of Xavier Harkonnen and Vorian Atreides, a human trustee with valuable inside information and machine thinking, the League Armada launched an all out strike against the Earth Omnius. Atreides was not much trusted and had to prove his loyalty to the humans in the battle.
During the assault, Omnius Prime realized he was doomed and sent an update ship carrying a gelsphere with a copy of himself for the other synchronized worlds, carrying orders about the extermination of humans. Atreides was the only one who noticed it and was faced with a grave choice. He had to abandon his post, condemning thus his co-pilots in the battle. He intercepted the update ship and board it; there he found Seurat. He managed to neutralize him and apprehend the gelsphere.
In the process planet Earth was completely irradiated and turned into a burnt husk.
The Battle of Earth was the first engagement of the Butlerian Jihad against the Machines.
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