"Semper Fi" is short for Semper Fidelis, a Latin phrase that means "Always Faithful." It has been the official motto of the U.S. Marine Corps since 1883.

One branch of the U.S. military is celebrating its birthday. Today, the U.S. Marine Corps turns 248! Happy Birthday, #Marines! For 248 years, Marines have been the first to fight.

The United States Marine Corps celebrates its 248th birthday on Friday, Nov. 10, 2023. ... according to Marine Corps University. Before 'Semper Fi,' there were three ...