French fries most likely originated in Belgium, where villagers along the River Meuse in the late 17th century reportedly fried sliced potatoes as a substitute for fish when the river froze. This culinary practice became a staple in the region and is widely recognized as the birthplace of French fries. The term "French fries" may have come from American soldiers in World War I who called them "French" fries because French was the official language of their Belgian allies. France also claims the origin of fries, pointing to Paris street vendors in the late 18th century selling fried potato spears. The name "French fries" is also linked to the culinary term "to French," meaning to cut food into thin strips—a method used for the potatoes. Thus, both Belgium and France have historical claims, but the stronger and more commonly accepted origin story attributes French fries to Belgium.