Smarter Wars

Chances of a US military combatant dying, or being wounded: -

1918 - World War I, 6.8%
1945 - World War II, 6.7%
1953 - Korean War, 2.7%
1973 - Vietnam War, 2.4%
1991 - Persian Gulf War (Desert Storm), 0.04%
Present - Afghanistan and Iraq Wars, 1.94%

Interestingly, no accurate statistics exist for civilian non-combatants.

(sources: Congressional Research Service, globalsecurity.org)