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Early in the Great War, some doctors began to suspect that moments of intense terror would affect even the strongest soldiers.

«I saw robust and strong men, trembling, grimacing like madmen, victims of a silent and uncontrollable terror.»

This is how the journalist Philip Gibbs described 100 years ago the effect that modern warfare had on the soldiers of the Western Front during the First World War.

The troops showed these disturbing symptoms in September 1914, barely a month after the conflict began.

Youngsters who had until recently been healthy and showed no signs of external injury were losing their sense of smell, sight, and taste.