Branch and Rank Description Army Navy / Coast Guard Air Force Marines Rank Code E01 Private (PV1) Seaman Recruit (SR) Airman Basic (AB) Private (PVT) E02 Private (PV2) Seaman Apprentice (SA) Airman (Amn) Private First Class (PFC) E03 Private First Class (PFC) Seaman (SN) Airman First Class (A1C) Lance Corporal (LCpl) Corporal (CPL) E04 Petty Officer Third Class (PO3) Senior Airman (SrA) Corporal (Cpl) Specialist (SPC) E05 Sergeant (SGT) Petty Officer Second Class (PO2) Staff Sergeant (SSgt) Sergeant (Sgt) E06 Staff Sergeant (SSG) Petty Officer First Class (PO1) Technical Sergeant (TSgt) Staff Sergeant (SSgt) Master Sergeant (MSgt) Enlisted E07 Sergeant First Class (SFC) Chief Petty Officer (CPO) Gunnery Sergeant (GySgt) First Sergeant (MSgt) Master Sergeant (MSG) Senior Master Sergeant (SMSgt) Master Sergeant (MSgt) E08 Senior Chief Petty Officer (SCPO) First Sergeant (1SG) First Sergeant (SMSgt) First Sergeant (1stSgt) Sergeant Major (SGM) Chief Master Sergeant (CMSgt) Master Gunnery Sergeant (MGySgt) E09 Master Chief Petty Officer (MCPO) First Sergeant (CMSgt) Command Sergeant Major (CSM) Sergeant Major (SgtMaj) Command Chief Master Sergeant (CCMSgt) O01 Second Lieutenant (2LT) Ensign (ENS) Second Lieutenant (2d Lt) Second Lieutenant (2dLt) O02 First Lieutenant (1LT) Lieutenant Junior Grade (LTJG) First Lieutenant (1st Lt) First Lieutenant (1Lt) O03 Captain (CPT) Lieutenant (LT) Captain (Capt) Captain (Capt) O04 Major (MAJ) Lieutenant Commander (LCDR) Major (Maj) Major (Maj) O05 Lieutenant Colonel (LTC) Commander (CDR) Lieutenant Colonel (Lt Col) Lieutenant Colonel (LtCol) O06 Colonel (COL) Captain (CAPT) Colonel (Col) Colonel (Col) Officer O07 Brigadier General (BG) Rear Admiral (lower half) (RDML) Brigadier General (Brig Gen) Brigadier General (Bgen) O08 Major General (MG) Rear Admiral (upper half) (RADM) Major General (Maj Gen) Major General (Mgen) O09 Lieutenant General (LTG) Vice Admiral (VADM) Lieutenant General (Lt Gen) Lieutenant General (LtGen) O10 General (GEN) Admiral (ADM) General (Gen) General (Gen) W01 Warrant Officer One (WO1) Warrant Officer (WO1) Warrant Officer (WO-1) W02 Chief Warrant Officer Two (CW2) Chief Warrant Officer Two (CW02) Chief Warrant Officer 2 (CWO-2) W03 Chief Warrant Officer Three (CW3) Chief Warrant Officer Three (CW03) Chief Warrant Officer 3 (CWO-3) W04 Chief Warrant Officer Four (CW4) Chief Warrant Officer Four (CW04) Chief Warrant Officer 4 (CWO-4) Warrant Officer W05 Master Chief Warrant Officer Four (CW5) Chief Warrant Officer Five (CW05) Chief Warrant Officer 5 (CWO-5).