Gyrene: Around 1900, members of the U.S. Navy began using Gyrene as a jocular derogatory reference to U.S. Marines. Instead of being insulted, the Marines loved it. The term became common by World War I and has been extensively used since that time.

Jarhead: For roughly 50 years, sailors had little luck in their effort to insult Marines by calling them Gyrenes. So, during World War II sailors began referring to Marines as Jarheads. Presumably the high collar on the Marine Dress Blues uniform made a Marine's head look like it was sticking out of the top of a Mason jar. Marines were not insulted. Instead, they embraced the new moniker as a term of utmost respect.

Devil Dogs: The German Army coined this term of respect for U.S. Marines during World War I. In the summer of 1918 the German Army was driving toward Paris. The French Army was in full retreat. In a desperate effort to save Paris, the newly arrived U.S. Marines were thrown into the breach. In June 1918, in bitter fighting lasting for weeks, Marines repeatedly repulsed the Germans in Belleau Wood. The German drive toward Paris sputtered, fizzled, and died. Then the Marines attacked and swept the Germans back out of Belleau Wood. Paris had been saved. The tide of war had turned. Five months later Germany would be forced to accept an armistice. The battle tenacity and fury of the U.S. Marines had stunned the Germans. In their official reports they called the Marines "teufel hunden," meaning Devil Dogs, the ferocious mountain dogs of Bavarian folklore.