The handwritten missive was written on May 27, 1915, from the Somme by 24-year-old Frenchman Sgt. Jean Soulagnes to a friend. Soulagnes was killed in fighting 12 days later in the battle of Hebuterne.
The letter was found by Marseille police in February in a search following a burglary.
With the aid of social media, authorities found Soulagnes' great-grandnephew, Stephane Drouhot. He attended a ceremony Friday at a Marseille police station where he was given the letter.
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