Graffiti is seen in the Froidmont quarry, a refuge for thousands of German, American and French soldiers during the First World War in Braye-en-Laonnois

U.S. Corporal Earle Madeley of Plainville, Connecticut, is one of the few who wrote his age, 20, in the Froidmont quarry, a 20 kilometers (12 miles) complex network of tunnels which became a refuge for thousands of German, American and French soldiers during the First World War in Braye-en-Laonnois, France. Madeley was killed few days afterwards, on July 21, 1918.
 

Inscriptions left by American soldiers of the 26th Division are seen among 1,000 inscriptions discovered in the Froidmont quarry a 20 kilometers (12 miles) complex network of tunnels, a refuge for thousands of soldiers during WW1 in Braye-en-Laonnois 

  soldat Swetmon de Boston