A bloodied french soldier is carried to a medical station after being injured during the Battle of Verdun in 1916. It was one of the longest and bloodiest battles of the war; French casualties amounted to about 400,000, German ones to about 350,000, some 300,000 were killed.

Source

Battle of Verdun
The Battle of Verdun, fought from 21 February to 18 December 1916, was the largest and longest battle of the First World War on the Western Front between the German and French armies. Wikipedia
Dates: Feb 21, 1916 – Dec 18, 1916
Location: Verdun, France
Result: French victory

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beetlejuice2386: Designed to ‘bleed the French white’, it was the longest and second deadliest of WW1. In fact, it took so much out of the German Army that, once it was over, the Germans avoided initiating any further Western Front offences for almost two years, until spring 1918.

Sparrowinthewind: Wow, that is amazing. I just finished Dan Carlin’s podcast on the first world war, it just feels like such a tragedy, even more so than WW2