What supplies were flown into Hagaru-ri during the battle?

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During the Battle of the Chosin Reservoir, Marine and Air Force transport aircraft flew critical supplies into the Hagaru-ri perimeter to support the 1st Marine Division. Specifically, these flights delivered essential ammunition and gasoline, the latter of which was vital for operating vehicles and artillery tractors in the severe winter conditions.1

In addition to bringing in these supplies, the air bridge was used to evacuate approximately 4,500 wounded and frozen casualties from the area.1