From Halopedia, the Halo wiki
UNSC Thatcher is a ship in service with the UNSC Navy.
Before UNSC Port Stanley and her crew departed for Cascade on shore leave in 2553, Kilo-Five was deployed to retrieve a shipment of armaments from Thatcher. They were to be delivered to Avu Med 'Telcam, leader of the Servants of the Abiding Truth.
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