Rank varies from branch to branch.
Rank varies from branch to branch.

Every branch of the military has enlisted ranks and officer ranks. The pay grades that correspond to these ranks are abbreviated as E-1 through E-9 for enlisted and O-1 through O-10 for officers. The one exception is the Navy, which has an O-11, a fleet admiral. There is also a group of commissioned officers that are specialists in a particular field and do not have the same responsibilities as other officers. These are called warrant officers and range in the pay grades of W-1 through W-5. Except for the Air Force, every branch of the military has warrant officers. While these pay grades are consistent across all branches of the military, the rank and abbreviation associated with them varies.

Army

The enlisted ranks for the Army, from lowest to highest, are as follows: private (PVT), 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) and sergeant major of the army (SMA). Officers in the Army, from lowest to highest, are as follows: second lieutenant (2LT), first lieutenant (1LT), captain (CPT), major (MAJ), lieutenant colonel (LTC), colonel (COL), brigadier general (BG), major general (MG), lieutenant general (LTG), general (GEN) and general of the Army.

Marine Corps

The Marines Corps enlisted rank structure, from lowest to highest, is as follows: 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) and sergeant major of the Marine Corps (SgtMajMC). The officer ranks of the Marine Corps have the same names as the Army, with the exception of "General of the Army," but are abbreviated differently. The abbreviations, from lowest to highest, are as follows: 2ndLt, 1stLt, Capt, Maj, LtCol, Col, BGen, MajGen, LtGen and Gen.

Navy

Navy enlisted ranks, from lowest to highest, are as follows: seaman recruit (SR), seaman apprentice (SA), seaman (SN), 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) and master chief petty officer of the Navy (MCPON). The officer ranks for the Navy, from lowest to highest, are as follows: ensign (ENS), lieutenant junior grade (LTJG), lieutenant (LT), lieutenant commander (LCDR), commander (CDR), captain (CAPT), rear admiral lower half (RDML), rear admiral upper half (RADM), vice admiral (VADM), admiral (ADM) and fleet admiral (FADM).

Air Force

The enlisted ranks for the Air Force, from lowest to highest, are as follows: airman basic (AB), airman (Amn), airman first class (A1C), senior airman (SrA), staff sergeant (SSgt), technical sergeant (TSgt), master sergeant (MSgt), first sergeant (1stSgt), senior master sergeant (SMSgt), chief master sergeant (CMSgt), command chief master sergeant (CCMSgt) and chief master sergeant of the Air Force (CMSAF). The Air Force officer ranks have the same names as the Army and Marines but are abbreviated differently. The abbreviations, from lowest to highest, are as follows: 2d Lt, 1st Lt, Cpt, Maj, LtCol, Col, BrigGen, MajGen, LtGen and Gen. The Air Force also has at the top spot a General of the Air Force

Coast Guard

The Coast Guard has the same rank names and abbreviations as the Navy. The only difference in the enlisted ranks is Master Chief Petty Officer of the Coast Guard (MCPO-CG), and the officer ranks only go up to admiral and do not have an admiral of the Coast Guard.