Obama recognized 62 veterans of that 1950s conflict who were in the audience at an Army installation in Seoul, South Korea. The president told the veterans that the world is better off because of their actions here decades ago.
Obama also recognized Korean soldiers who fought alongside American forces.
After three years of combat, U.S. troops drove the invading North Korean forces out of South Korea and back over the 38th parallel, now the Demilitarized Zone that divides the countries.
Obama is in South Korea for a meeting of the Group of 20 economic powers.