The motto of the Marines, it means, Always Faithful. 

"Esprit de Corps"
The "spirit" of a unit. This spirit is commonly reflected by all members of the Marine Corps. It implies devotion and loyalty to the Marine Corps, with deep regard for teamwork, history, traditions and honor.

"Gung Ho"

The chant of the Marines simply means TeamWork, emphasizing that no Marine is ever alone on the battlefield, that Marines work together to accomplish their missions. 

The Battle Cry of the Marine Corps also used to show agreement and excitement. 

Unit - the men that you directly serve with; Corps Every Marine (past and present; living and dead); God Our lord savior who we go gladly go to in defense of our way of life; Country The United States and all her glory who we would happily make our enemy lay down their lives to protect.

"First to Fight"

Marines have been in the forefront of every American war since the founding of the Corps. They have carried out over 300 landings on foreign shores. They have served everywhere, from the poles to the tropics. Their record of readiness reflects pride, responsibility and acceptance of challenge.