I vaguely recall the stories of the American Expeditionary force referring to a french light machine gun as the "Worst piece of equipment ever foisted off on the fighting men of the the United States," and used wikipedia to find the gun. Fun story, Pershing refused to let superior American made weapons onto the battle field (like the Browning Automatic Rifle or the Thompson Sub Machine gun) because he was afraid the Germans might copy them. Instead the American soldiers had to make due with the Chauchat.