Semper Fidelis

Semper Fidelis is Latin for "Always Faithful". Well known in the USA as the motto of the United States Marine Corps, this phrase, often shortened to Semper Fi (/ˌsɛmpər ˈfаɪ/) in Marine contexts, has served as a slogan for many families and entities, in many countries, dating at least as far back as the 14th century.