The United States Marine Corps, often referred to as simply "the Marines," has a storied history of protecting the nation and serving in times of conflict. However, there are several synonyms for "the Marines" that are often used in different contexts. Some of these terms include "leathernecks," which refers to the high leather collars worn by the Marines in the early days of the Corps, and "jarheads," a slang term that originated from the Marine haircut, which leaves the scalp looking like a jar. Another common synonym is "Devil Dogs," based on a comment made by a German soldier during World War I, who described the Marines as "teufelhunden" or "devil dogs".