Kocak was awarded his Medals of Honor for action south of Soissons, France, 18 July 1918. His Navy citation reads, "For extraordinary heroism while serving with the Sixty-sixth Company, Fifth Regiment, Second Division, in action in the Viller-Cottertes section, south of Soissons, France, 18 July 1918. When a hidden machine gun nest halted the advance of his battalion, Sergeant Kocak went forward alone unprotected by covering fire and worked his way in between the German positions in the face of heavy enemy fire. Rushing the enemy position with his bayonet, he drove off the crew. Later the same day, Sergeant Kocak organized French colonial soldiers who had become separated from their company and led them in attacking another machine gun nest, which was also put out of action." His Army citation reads, "When the advance of his battalion was checked by a hidden machine-gun nest, he went forward alone, unprotected by covering fire from his own men, and worked in between the German positions in the face of fire from enemy covering detachments. Locating the machine-gun nest, he rushed it and with his bayonet drove off the crew. Shortly after this he organized 25 French colonial soldiers who had become separated from their company and led them in attacking another machine-gun nest, which was also put out of action." He was killed less than three months later in the vicinity of Thiaucourt, France.