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North Korea invades South Korea with 135,000 men, initiating the Korean War.
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Destroyers USS Mansfield and USS De Haven help evacuate 700 Americans and friendly foreign nationals from Inchon, South Korea.
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33 officers and men of Detachment X of the 507th Antiaircraft Artillery Battalion deploy from Japan to protect Suwon Airfield. They are the first U.S. ground troops in Korea.
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Near Samchock, South Korea, light cruiser USS Juneau conducts the first naval gunfire mission of the war.