we lost 600,000 lifes during Korean War.

US Troops Statistics:
Source: Dept. of Defense
US Deaths:
Hostile: 33,739
Non-Hostile: 2,835
Total In-Theatre: 36,574
US Wounded in Action - 103,284
Other Casualties by Country (killed and missing):
Source: Encyclopedia Britannica
South Korea - (217,000 military, 1,000,000 civilian)
North Korea - (406,000 military, 600,000 civilian)
China - (600,000 military)

https://www.cnn.com/2013/06/28/world/asia/korean-war-fast-facts/index.html