Animals were used in World War I on a scale never before seen—and never again repeated. Horses by the millions were put in service as cavalry mounts and beasts of burden, but they were not the ...

World War I was also the first major conflict to occur after the camera became more accessible. Take a look at photos of what happened before, during and after the U.S. joined the “Great War ...

But, of course, we now know that it was just the first World War – and a preview of more conflict to come. More than 8.5 million troops perished in World War I, which ended 100 years ago this week.

German Zeppelin LZ 77 shortly before it was shot down at Revigny during the opening phase of the Battle of Verdun, France, February 21, 1916. Verdun was the war’s longest battle, lasting 298 days.

Photographer Peter Macdiarmid collected modern photos from around Europe and overlaid World War I-era images, giving a sense of how much--and how little--has changed since the War to end all Wars.

On Nov. 11, 1918, an armistice was reached between the Allies and Germany. The First World War – the so-called “war to end all wars” – was officially over. Yet, while it was certainly a ...

The photos contained in the Atlantic project are gripping, both in their depictions of the damage caused by the war and the humanity of the soldiers who fought it.

But, of course, we now know that it was just the first World War – and a preview of more conflict to come. More than 8.5 million troops perished in World War I, which ended 100 years ago this week.

World War I in Photos: Technology. Industrialization brought massive changes to warfare during the Great War. Newly-invented killing machines begat novel defense mechanisms, which, in turn spurred ...