The Battle of Lampadas of 15240 AG was the battle which saw the planet destroyed.
7,622,014 Reverend Mothers were posted at Lampadas at the time of the Honored Matre attack and despite the efforts of the Bashar Burzmali (who was killed in the attack) and his warriors, along with the Bene Gesserit, only one Reverend Mother - Lucilla - managed to escape the planet alive, though she did carry the Shared memories of all her deceased Sisterhood on Lampadas.