Depot of the V Amphibious Corps at Pearl Harbor, Hawaii. On January 29, 1944, he was promoted to private first class. On January 10, 1945, according to statements he made to his comrades, Lucas walked out of camp to join a combat organization wearing a khaki uniform and carrying his dungarees and field shoes in a roll under his arm. He was declared UA (Unauthorized Absence) when he failed to return that night. He stowed away on board the , which was transporting the 1st Battalion, 26th Marines of the 5th Marine Division to Iwo Jima. On February 8, the day before he would have been placed on the Marine Corps "deserter list", he turned himself in to Marine Captain Robert Dunlap, commanding officer of C Company. He was taken by Dunlap to the battalion's commanding officer, Lieutenant Colonel Daniel C. Pollock, who assigned him to Dunlap's rifle company as a rifleman. His punishment for going UA was an administrative reduction in rank to private. On February 14, Lucas had his 17th birthday while at sea, five days before the invasion of Iwo Jima began. On February 19, Lucas participated in the 5th Division's landing on Iwo Jima with C Company, 1st Battalion, 26th Marines. On February 20, Lucas and three Marines who were members of a four-man fire team from one of C Company's platoons were creeping through a twisting ravine towards or at an enemy airstrip when they spotted an enemy pillbox and took cover in a trench. They then spotted 11 Japanese soldiers in a parallel trench (they had a tunnel to there from the pillbox) and opened fire on them with rifles. The Japanese also opened fire and threw two grenades inside the Marines' trench in front of them. Lucas spotted the grenades on the ground in front of his comrades and yelled "grenades". He then jumped over a Marine and dove for them, jamming one of them into the volcanic ash and soft sand with his rifle and covering it with his body, while reaching out and pulling the other one beneath him. One grenade exploded, tossing Lucas onto his back and severely wounding him in the right arm and wrist, right leg and thigh, and chest. He was still conscious and barely alive after the blast, holding in his left hand the other grenade, which did not explode. His three comrades were unharmed, and