A military parade is underway in front of Sungnyemun Gate in Seoul, Sept. 26, to mark the 75th anniversary of Armed Forces Day. Yonhap

Citizens watch the military parade that is underway to mark the 75th anniversary of Armed Forces Day in central Seoul's Gwanghwamun Square, Sept. 26. Yonhap

Republic of Korea military personnel of an armored division participate in a parade in central Seoul, Sept. 26, during a ceremony to mark the 75th anniversary of Armed Forces Day. Yonhap

President Yoon Suk Yeol, right, shakes hands with a cadet while attending a military parade in downtown Seoul, Sept. 26, in commemoration of the 75th anniversary of Armed Forces Day, in this photo provided by the presidential office. Yonhap

Republic of Korea military personnel of an armored division salute at Seoul Air Base in Seongnam, Gyeonggi Province, Sept. 26, during a ceremony to mark the 75th anniversary of Armed Forces Day. Yonhap

Republic of Korea military personnel and units' flagbearers perform during a ceremony at Seoul Air Base in Seongnam, Gyeonggi Province, Sept. 26, to mark the 75th anniversary of Armed Forces Day which falls on Sunday. Yonhap

President Yook Suk Yeol, right in car, inspects a military formation at Seoul Air Base in Seongnam, Gyeonggi Province, Sept. 26, during a ceremony to mark the 75th anniversary of Armed Forces Day which falls on Sunday. Yonhap

President Yook Suk Yeol speaks at Seoul Air Base in Seongnam, Gyeonggi Province, Sept. 26, during a ceremony to mark the 75th anniversary of Armed Forces Day which falls on Sunday. Joint Press Corps

Army cadets march at Seoul Air Base in Seongnam, Gyeonggi Province, Sept. 26, during a ceremony to mark the 75th anniversary of Armed Forces Day which falls on Sunday. Joint Press Corps

Republic of Korea military personnel salute the national flag at Seoul Air Base in Seongnam, Gyeonggi Province, Sept. 26, during a ceremony to mark the 75th anniversary of Armed Forces Day which falls on Sunday. Joint Press Corps

Republic of Korea military personnel of an armored division salute at Seoul Air Base in Seongnam, Gyeonggi Province, Sept. 26, during a ceremony to mark the 75th anniversary of Armed Forces Day which falls on Sunday. Yonhap