The Battle of Junction was the last battle of the War of the Sisterhoods which took place between the Bene Gesserit and the Honored Matres.
After the memories of the Miles Teg ghola were awwakened by Reverend Mother Sheeana using imprinting techniques, Mother Superior Darwi Odrade appointed him again as Bashar of the military forces of the Sisterhood for the assault on the Honored Matres. Odrade announced to the Bene Gesserit that Teg would lead an attack against the Honored Matres. She also made clear her intention to share her memories with Murbella and Sheeana, making them candidates to succeed her as Mother Superior if she died.
Odrade met with the Great Honored Matre Dama while the Bene Gesserit forces under Teg attacked Gammu with tremendous force. Teg used his secret ability to see no-ships to secure control of the system, and victory for the Bene Gesserit seemed inevitable. In the midst of this battle, Rebecca and the Jews took refuge with the Bene Gesserit fleet.
Dama's chief advisor Logno assassinated Dama with poison and took the title of Great Honored Matres, assuming control of the Honored Matres. Too late, Odrade and Teg realized they had fallen into a trap, and the Honored Matres use the Weapon to turn defeat into victory, and capture Odrade. Murbella saved as much of the Bene Gesserit force as she could and they withdrew to Chapterhouse. Odrade, however, had planned for the possible failure of the Bene Gesserit attack and left Murbella instructions for a last desperate gamble.
Murbella piloted a small craft down to the surface, announcing herself as an Honored Matre who, in the confusion, had managed to escape the Bene Gesserit with all their secrets. She arrived on the planet and was taken to Logno. Unable to control her anger, Logno attacked but was killed by Murbella. Awed by her physical prowess, the remaining Honored Matres were forced to accept her as their new leader. Odrade was also killed in the melee and Murbella shared with Odrade to absorb her newest memories, as they had already shared prior to the battle.
Murbella's ascension to leadership was not accepted as victory by all the Bene Gesserit. Some fled Chapterhouse, notably Sheeana, who had a vision of her own, and arranged to have some of the new worms that had emerged in the Chapterhouse desert brought aboard the no-ship. Sheeana was joined by the final Duncan Idaho ghola. The two escaped in the giant no-ship, with Scytale, Teg and the Jews. Murbella recognized their plan at the last minute, but was powerless to stop them. Instead, she began the conversion of the Honored Matres to Bene Gesserit Sisters, merging the two groups.