The U.S. Marine Corps motto is “Semper Fidelis” – “Always Faithful.” The U.S. Coastguard's is “Semper Paratus” – “Always Ready.” The U.S. Air Force motto is “Aim High... Fly-Fight-Win,” and one of the U.S. Navy's unofficial mottos is “Semper Fortis” – “Always Courageous.”