kids hiding in a trench during air raids.

soldier in a trench suffering from shell shock. For thousands of soldiers in the Great War, the fear, paranoia hysterical crying, terrible nightmares, mutism, fatigue, facial tics, and tremors were symptomatic of shell shock.

a solider in a trench

Lance Cpl. James Farley cries after having just witnessed the shooting of two crew mates, one fatally.

A lone British soldier stands up to his knees in spent shell cases. France, WWI.

Iconic Vietnam War photo: The body of an American paratrooper killed in action in the jungle near the Cambodian border is raised up to an evacuation helicopter in War Zone C, Vietnam in 1966

Marines wade ashore with heavy equipment at first light at Red Beach near Da Nang in Saigon on April 10, 1965. 

A Marine,, pours water into the mouth of a fellow Marine suffering from heat during Operation Hastings along the demilitarized zone between North and South Vietnam on July 21, 1966.

A German boy walks down a dirt road flanked by rows of victims of German extermination practices at Bergen-Belsen concentration camp, 20 May 1945.

Phan Thi Kim Phuc (center) flees with other children after South Vietnamese planes mistakenly dropped napalm on South Vietnamese troops and civilians