Sahak Sahakyan participated in World War II, volunteering for frontline duty in 1941. He serving in the 663rd Rifle Regiment, where he engaged in pivotal battles for Novorossiysk, Tuapse, and Gelendzhik. In 1942–1943, he sustained serious injuries on the front lines, leading to his transfer to the Tbilisi hospital, located in the former Nersisyan school building. Following his recovery, Sahakyan continued his service as a private in the rifle battalion of the 42692nd military unit. In recognition of his valor, he was honored with several medals and orders.[4]