The Battle of Rakis was a battle in 15229 AG during the war between the Bene Gesserit and the Honored Matres.
The Honored Matres attacked the planet of Rakis using The Weapon, killing Mother Superior Alma Mavis Taraza. Reverend Mother Darwi Odrade became temporary leader of the Bene Gesserit before escaping with Sheeana Brugh into the desert on a worm. Bashar Miles Teg also went to a supposed safe house, only to discover the Honored Matres. He unleashed himself upon the complex, and found that his prescient powers allowed him to 'see' shielded no-ships; he captured one and located the final Duncan Idaho ghola and Reverend Mother Lucilla. They were taken to Rakis with him and the now-hostage Honored Matre Murbella. When they arrived, Teg intercepted Odrade and Sheeana and their giant worm, having seen Taraza's master plan with his new vision. He loaded them all up in his no-ship, finally leading his troops out on a last suicidal defense of Rakis, designed to attract the rage of the Honored Matres. The Honored Matres decided to destroy the planet and the sandworms — except for the one the Bene Gesserit escaped with, and Sheeana.