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The battle Ī Spirit dropship near the downed Autumn. Thanks to the simultaneous Raid on the Truth and Reconciliation being conducted by the Master Chief, Covenant forces on the ring were distracted, allowing an easier insertion by McKay's forces. Several teams were deployed onto the plains ahead of the main force via Pelican dropships Echo 136 and Echo 206, with the ring's unpredictable weather granting rain to provide the teams cover. The troopers then filed onto their D77-TC Pelican dropship for the short flight over to the plains where the Autumn lay. The troopers were briefed by Major Antonio Silva on the mission - to recover supplies (and a bottle of scotch left in the Major's office) before the Covenant could launch an all-out attack on Alpha Base. A team of troopers assembled on the landing pad of Alpha Base in the night before insertion for inspection by Sergeant Lister to ensure none of the marines' full combat loads would make any noise that might give the teams away during the mission. To ensure the success of UNSC prolonged operations on the ring, Lieutenant McKay was ordered to take a contingent of ODSTs to scout out the wreckage of the Pillar of Autumn and recover as many weapons, supplies and vehicles as they could. Following the ship's crash-landing, the Covenant instilled a guard detail on the ship to prevent human intrusion consisting of two Type-26 Banshees and six Type-32 Ghosts, as well as various infantry. The ship's Orbital Drop Shock Troopers deployed via SOEIV drop pods, and regrouped to take over the facility later referred to as Alpha Base. During the subsequent space battle and boarding attempts conducted by the Fleet of Particular Justice, Captain Jacob Keyes initiated Article 2 of the Cole Protocol - ordering a general evacuation of the ship by all crew. On September 19, 2552, the Halcyon-class light cruiser arrived in the Soell system near the megastructure Installation 04, having narrowly escaped the Fall of Reach.
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The Raid on the Pillar of Autumn was a UNSC mission occurring during the Battle of Installation 04, in which ODST forces led by Lieutenant Melissa McKay launched a raid to gather arms and supplies from the wreckage of the downed UNSC Pillar of Autumn.
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