They were call "Poilu."
Doughboys
Doughboys
Doughboys
Doughboys
Doughboys
Doughboys
Lobster Backs was the nickname for a British soldier during the French and Indian War because the British soldiers war red coats.
Besides the already popular term "Yanks," US infantry soldiers in World War I were known as doughboys (the source of the nickname is not definitively established)
American soldiers were also known as doughboys
doughboys
The correct answer is Doughboys
doughboys