World War II (1940 –1945)
Total Servicemembers (Worldwide): 16,112,566
Battle Deaths: 291,557
Korean War (1950-1953)
Total Servicemenbers (Worldwide): 5,720,000
Battle Deaths: 33,686
Vietnam War (1964-1975)
Deployed to Southeast Asia: 3,100,000
Battle Deaths: 47,410
Gulf War (1990-1991)
Deployed to Gulf: 1,136,658
Battle Deaths: 148
Gulf War2 (2003- )
Battle Deaths: 803
Source