Most of the crew - not to mention your fellow jarheads - will be leaving the ship in lifeboats. They'll ride to the surface in air conditioned comfort, sipping wine, and nibbling on appetizers. Not you, however. Oh no, you're going to leave the Pillar of Autumn in a different method. Tell me boys and girls… how will you leave?”
— Major Antonio Silva, aboard UNSC Pillar of Autumn
“We go feet first, sir!”
— Shock Trooper's response.



Air Force
Pay grade

Insignia/Title
Airman Basic (AB)

Airman (Amn)

Airman First Class (A1C)

Senior Airman (SrA)

Staff Sergeant (SSgt)

Technical Sergeant (TSgt)

Master Sergeant (MSgt)

Senior Master Sergeant (SMSgt)

Chief Master Sergeant (CMSgt)

Command Chief Master Sergeant (CCM)
Army
Pay grade

Insignia/Title
Private (Pv1)

Private (Pv2)

Private First Class (PFC)

Specialist (SPC)

Corporal (CPL)

Sergeant (SGT)

Staff Sergeant (SSG)

Sergeant First Class (SFC)

Master Sergeant (MSG)

First Sergeant (1SG)

Sergeant Major (SGM)

Command Sergeant Major (CSM)
Marine Corps
Pay grade

Insignia/Title
Private (Pvt)

Private First Class (PFC)

Lance Corporal (LCpl)

Corporal (Cpl)

Sergeant (Sgt)

Staff Sergeant (SSgt)

Gunnery Sergeant (GySgt)

Master Sergeant (MSgt)

First Sergeant (1stSgt)

Master Gunnery Sergeant (MGySgt)

Sergeant Major (SgtMaj)
Navy
Pay grade

Insignia/Title
Crewman Recruit (CR)

Crewman Apprentice (CA)

Crewman (CN)

Petty Officer Third Class (PO3)

Petty Officer Second Class (PO2)

Petty Officer First Class (PO1)

Chief Petty Officer (CPO)

Senior Chief Petty Officer (SCPO)

Master Chief Petty Officer (MCPO)