They carried out ambush attacks on any Locust that got near their haven, and successfully remained hidden for four months after the fall of the city. They had a fortified secure bunker to hide in, and several greenhouses where they grew vegetables. Matron and other staff members of the Jilane Birthing Creche, along with several patients and children living there, joined forces to try and survive in the ruins of the birthing creche. The GBL was founded by Matron after the city of Jilane was abandoned by the Coalition of Ordered Governments during the Jilane Massacre, due to the overwhelming force of the Locust attack.