没那么悬殊。

联合国军方面还有４０００多失踪７０００多非战斗伤亡
所以加起来也有１３０００－１５０００多人伤亡。和中国
方面的损失也有可比较性

http://en.wikipedia.org/wiki/Battle_of_Chosin_Reservoir

Nominal: 103,520[4]
Committed: ~30,000[5] Nominal: 150,000[6]
Committed: ~60,000[5]
Casualties and losses
US sources:
1,029 killed
4,582 wounded
4,894 missing
7,338 non-battle casualties[7][nb 2]
15 tank losses[8]
Chinese estimation:
13,900[6] Chinese sources:
19,202 battle casualties
28,954 non-battle casualties[6]
Unofficial estimations: ~60,000[9][nb 3]
UN estimation:
29,800 battle casualties
20,000+ non-battle