50 miles north of Seoul, South Korea, October 1959: Republic of Korea First Army infantrymen, gas masks on and bayonets at the ready, break through a simulated poison gas cloud.

Operation Killing Zone, largest military field exercise since the founding of the First Republic of Korea Army, recently deployed 50,000 troops in a maneuver conducted under simulated atomic conditions.

Oct. 14, 1964, Tokyo: Billy Mills, a U.S. Marine, wins the gold medal in the 10,000 meters at the Tokyo Olympics in 1964.

Military scientists have identified the remains of a Wisconsin airman who died during World War II when his plane was shot down over Germany during a bombing mission.

On Wednesday, the American Battle Monuments Commission placed a rosette next to the name of Army Cpl. Robert A. Bartlett on the Wall of the Missing at Normandy American Cemetery in Colleville-sur-Mer.

FOB Summerall, Iraq, July 18, 2008: U.S. Army 1st Lt. Ben Juvinal does his best to hold back the tide during a one-sided soccer match between U.S. and Iraqi troops commemorating the American departure from Forward Operating Base Summerall.

Con Thien, South Vietnam, Aug. 15, 1968: Pvt. 1st Class Richard M. Topeka of B Company, 1st Battalion, 1st Marine Regiment, 3rd Marine Division walks along the dirt road of Con Thien Marine base, his M60 resting on his right shoulder.

On March 11, 1968, a tactical air navigation radar location perched atop a mountain in Laos was overrun by North Vietnamese forces. Before rescue helicopters arrived, 11 of the 19 servicemembers that fled the site had been killed including Air Force Sgt. David S. Price, whose remains have now been accounted for.

Mosul, Iraq, Aug. 20, 2010: An American soldier patrols at sunset outside of Mosul.