Korean War (1950-1953)

The Korean War — dubbed the Forgotten War — killed approximately 4 million people and ended in an armistice, not a peace treaty, leaving the peninsula technically at war for over 70 years. Its most lasting outcome: cementing US military alliances across Asia (South Korea, Japan, Taiwan, Philippines), while creating the starkest economic contrast on Earth — South Korea's GDP per capita ($33,000) is 40 times higher than North Korea's ($800), a gap far wider than #7 Vietnam War's regional disparities of roughly tenfold. China's intervention confirmed it as a military power reshaping Cold War dynamics, with total US casualties of 36,574 deaths — 80% attributed to ground combat.