“Every Marine a Rifleman” is a basic tenet of the US Marine Corps. At boot camp, every Marine receives training in marksmanship, hand-to-hand combat, and teamwork. Regardless of how (s)he ends up serving in the Corps – as a mechanic, lawyer, clerk, pilot, dentist, or pastry chef – every Marine is prepared and expected to apply their combat training whenever it’s required. That rifleman commitment serves as a tactical cornerstone of the Marine Corps’ Semper Fi ("Always Loyal"

In 1958, Gilbert Morris – an account executive at the Fuller Smith & Ross ad agency – created the, “I don’t know who you are,”...