“When I die, please bury me deep! Place an MA5 down by my feet! Don't cry for me, don't shed no tear! Just pack my box with PT gear! 'Cuz one early morning 'bout zero five! The ground will rumble, there'll be lightning in the sky! Don't you worry, don't come undone! It's just my ghost on a PT run!” -UNSC Cadence

“They're the best of the best, but they're only human.” -Halo: Combat Evolved Manual.

The 'UNSC 'Marine Corps is a branch of the 'UNSCDF' 'that is responsible for land-based military operations, as well as the protection of Naval vessels and installations from attack.

A rugged and diverse assortment of well-equipped  and well-trained men and women, one of the Marine Corps' most notable conflicts was fighting a losing war against the Covenant's highly superior technology and numbers.