Corporal
Scarlet Trouser Stripe (Blood Stripe) - The red stripe was first seen on Marine uniforms in 1796. It was used off and on until uniform regulations made it standard on all NCO and Officer uniforms in 1859. It is rumored that the stripe represents the blood shed by Marines at the Battle of Chapultepec in the war with Mexico in 1846.
It depends of what rank you are.
Lutenient general
The rank of Corporal
being a lad
The Scarlet Stripe, often called the Blood Stripe has been an official part of the uniform regulations for NCO's and Officers since 1859 and is said to commemorate the bloodshed by Marine officers and non-commissioned officers at the Battle of Chapultepec in Mexico in 1846. Therefore it is only worn by Corporals and above in the Marine Corps.
It is not issued, it is earned. Officers earn it by completing training to qualify for active duty. Enlisted Marines earn it by earning the non-commissioned officer status of at least corporal. As a fairly large number of active-duty Marines have not yet reached that status, a fairly large number of Marines can not wear it on dress blue uniforms.
The red stripe comes before the white stripe because the red stripe stands for blood which means the sacrified blood that was lost in war when the U.S.A was found and the white stripe comes after because the white stands for pride, honor, and foundation.
Usually the owners rank in the military, or their flag
That is the rank of Sergeant.
Crease? Do you mean "blood stripe?" The blood stripe which is the red stripe on Marine Corps blue trousers signifies the blood shed by those who fought and died in the Marine Corps.
The black leaf insignia is used for the Major rank in the Army. It is all for the Major rank in the Air Force and Marines.