The Korean War started on June 25th, 1950, when the Communist government in the North launched a surprise invasion of South Korea.
The war ended three years later on July 27th, 1953, with a ceasefire and the signing of an armistice agreement that divided the country.
Korea marked the day on Sunday with a ceremony honoring the sacrifices of the hundreds of thousands who died in the conflict.
The event was held at the Joint Security Area in Panmunjom, the exact location where the armistice agreement was signed 61 years ago.
General Curtis Scaparrotti, the commander of the United Nations Command, was in attendance, along with other senior officials and Korean War veterans.
"Our strive in maintaining the armistice, we are honoring the sacrifice of almost 180-thousand men and women who died fighting under the UN flag and we acknowledge the estimated 2.5 million civilians who also died during the Korean War. We take steps to maintain stability and security in the region. We display our desire to never again incur such a great cost."
In the wake of the recent provocative acts from North Korea, General Scaparrotti also had a strong message for Pyongyang.
"Their continued opposition in defiance of United Nations Security Council resolutions as well as the international community norms is unacceptable and it further isolates them from the international community, further deprives their people of any hope of prosperity in the future."
"This ceremony not only serves to mark the signing of the armistice agreement. It's also a solemn reminder that the two Koreas are technically still at war.
Kim Hyun-bin Arirang News, Panmunjom."