The US X Corps and the ROK I Corps reported a total of 10,495 battle casualties: 4,385 US Marines, 3,163 US Army personnel, 2,812 South Koreans attached to American formations and 78 British Royal Marines.[1]:347 The 1st Marine Division also reported 7,338 non-battle casualties due to the cold weather, adding up to a total of 17,833 casualties.[1]:345
Appleman, Roy (1990). Escaping the Trap: The US Army X Corps in Northeast Korea, 1950. Military History Series. Texas A&M University. ISBN 9780890963951.
在包圍圈內部的美軍大概有三萬人,主要是陸戰第一師(從損失數字中陸一師的比例可見)。(Appleman, pp. 24)
我前兩天貼過一個美軍對42個被打殘的步兵營(其實還加上5個全滅的)的分析,部隊崩潰點大概發生在未補充的兵員損失達到30-40%的水平。
所以陸一師在長津湖的損失以師的規模,在美軍的作戰史上是極為嚴重的。該師在海空軍火力掩護下撤到後方補充了兩個月損失之後才重返前線。