On July 28, 1914, Austro-Hungarian troops fired the first shots during the invasion of Serbia that marked the start of World War I. The conflict resulted in more than 16 million military and civilian deaths, but did not bring about the end to all wars as some hoped and dreamed it would. One-hundred years later, harrowing images from the war retain their power and immediacy. Included in this collection are photos that have been only recently discovered and shown publicly.
World War I: Scenes Of Life And Death

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Italian "Arditi" or shock troops wearing gas masks.

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An undated photo shows French soldiers moving a 95 mm cannon at an unknown location in France. A viscount in the Armored Cavalry Branch of the French Army left behind a collection of hundreds of glass plates by an unknown photographer that have only recently been published.

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An undated photo shows French soldiers posing in a trench at Suippes on the Champagne front in eastern France. From the viscount's collection.

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The retreat of King Peter I of Serbia (left, on cart) and his country's troops, following an invasion of Serbia by forces led by Germany, November 1915.