What was the duration of the Korean War?

The Korean War lasted from 1950 to 1953, making this the correct answer. This conflict began when North Korean forces invaded South Korea on June 25, 1950, which led to an extensive military engagement involving United Nations forces predominantly from the United States, as well as troops from other countries such as South Korea, the United Kingdom, and Canada. The war ended with an armistice agreement on July 27, 1953, which established the Korean Demilitarized Zone but did not result in a formal peace treaty, leaving the two Koreas technically still at war to this day.

The other date ranges provided do not correlate with significant events of the Korean War. The period from 1945 to 1948 encompasses the years immediately following World War II, during which Korea was under occupation by Soviet and American forces, leading eventually to its division. The years 1955-1958 and 1960-1963 have no direct ties to the Korean War, as they fall outside the timeframe of military actions and significant political events related to this conflict.