An officer receives a camera and its film to be processed in the field in an undated photo from World War One. World War One pioneered many "firsts" in technological, scientific and societal innovations. Aircraft were deployed in war en masse for the first time, for both air to air combat and for reconnaissance. REUTERS/Handout via National Defense Intelligence College 

1st Lt. Eddie Rickenbacker, America's most successful World War One fighter ace, is seen next to a biplane in an undated photo. World War One gave birth to the fighter pilot, including fighter aces. REUTERS/Handout via U.S. National Archives 

U.S. soldiers of Company B, 165th Infantry Regiment, 42d Division, await German patrols near Hazavant, France September 14, 1918. World War One pioneered many "firsts" in technological, scientific and societal innovations. Before the broad issuing of steel helmets, most soldiers wore cloth caps. REUTERS/Handout via U.S. National Archives 

U.S. artillerymen fire a 75mm gun toward Montsec from a position near Beaumont, France on September 12, 1918. World War One pioneered many "firsts" in technological, scientific and societal innovations. It was the first major war where a majority of combat casualties were inflicted by artillery. REUTERS/Handout via U.S. National Archives