| Counterpart/THDNA |
| Comparable Rank Titles/Abbrv between Allied Forces in Vietnam |
| ( Note: Vietnamese Titles changed during the war. ) |
| United States | S Vietnam | S Korea | Australia | New Zealand | Spain | Thailand | |||||||
| Grd | Army | USMC | Navy | USAF | USCG | CIV | A,M,AF | Navy | AROK | ATTV | ATTV | TCDH | RTA |
| E-1 | PVT | Pvt | SR | AB | GS-1 | Binh Nhi | Binh Nhi | ? | REC | Soldado | ? | ||
| E-2 | PV2 | PFC | SA | Amn | SA | GS-2 | Ideungbyeong | PTE | PTE | Soldado de primera | ? | ||
| E-3 | PFC | LCpl | SN | A1C | SN | GS-3 | Binh Nhat | Binh Nhat | Iideungbyeong | LCPL | LCPL | Cabo | Sip Tri |
| E-4 | CPL | Cpl | PO3 | SrA | PO3 | GS-4 | Ha Si | Ha Si | Sangdeungbyeong | CPL | CPL | Cabo primero | Sip Tho |
| E-4 | SP4 | GS-4 | Ha Si Nhat | Ha Si Nhat | |||||||||
| E-5 | SGT | Sgt | PO2 | SSgt | PO2 | GS-5 | Trung Si | Trung Si | Bueong jang | SGT | SGT | Cabo mayor | Sip Ek |
| E-5 | SP5 | GS-5 | |||||||||||
| E-6 | SSG | SSgt | PO1 | TSgt | PO1 | GS-5 | Hasa | SSGT | SSGT | Sargento | |||
| E-6 | SP6 | GS-5 | |||||||||||
| E-7 | SFC | GySgt | CPO | MSgt | CPO | GS-6 | Trung Si Nhat | Trung Si Nhat | Jungsa | Sargento primero | Cha Sip Tri | ||
| E-7 | 1Sgt | GS-6 | |||||||||||
| E-8 | MSG | MSgt | SCPO | SMSgt | SCPO | GS-6 | |||||||
| E-8 | 1SG | 1stSg | 1Sgt | GS-6 | Thu ong Si | Thu ong Si | Sangsa | WO2 | WO2 | Brigada | Cha Sip tho | ||
| E-9 | SGM | MGySg | MCPO | CMSgt | MCPO | GS-6 | Thu ong Si Nhat | Thu ong Si Nhat | Wonsa | Subteniente | Cha Sip Ek | ||
| E-9 | CSM | SgtMa | CMCPO | CM1Sgt | CMPO | GS-6 | WO1 | WO1 | Suboficial mayor | Cha Sip Ek Phiset | |||
| E-9 | SgtMa | CCMgt | GS-6 | WO | WO/RSM-A | ||||||||
| W-1 | WO | WO1 | GS-7 | ||||||||||
| W-2 | CW2 | CW2 | CW2 | CW2 | GS-7 | ||||||||
| W-3 | CW3 | CW3 | CW3 | CW3 | GS-8 | ||||||||
| W-4 | CW4 | CW4 | CW4 | CW4 | GS-8 | ||||||||
| W-5 | CW5 | CW5 | CW5 | GS-8 | |||||||||
| O-1 | 2LT | 2ndLt | ENS | 2nd Lt | ENS | GS-7 | Thieu uy | Thieu uy | Sowi | 2LT | 2LT | Alferez | Roi Tri |
| O-2 | 1LT | 1stLt | LTJG | 1st Lt | LTJG | GS-8/9 | Trung uy | Trung uy | Jungwi | LT | LT | Teniente | Roi Tho |
| O-3 | CPT | Capt | LT | Capt | LT | GS-10/11 | Dai uy | Dai uy | Daewi | CAPT | CAPT | Capitan | Roi Ek |
| O-4 | MAJ | Maj | LCDR | Maj | LCDR | GS-12 | Thieu ta | Thieu ta | Soryeong | MAJ | MAJ | Comandante | Phan Tri |
| O-5 | LTC | LtCol | CDR | Lt Col | CDR | GS-13/14 | Trung ta | Trung ta | jungnyeong | LTCOL | LTCOL | Teniente coronel | Phan Tho |
| O-6 | COL | Col | CAPT | Col | CAPT | GS-15 | Dai ta | Dai ta | Daeryeong | COL | COL | Coronel | Phan Ek |
| O-7 | BG | B Gen | RDML | Brig | RDML | SES 5 | Chuan tu ong | Pho de doc | Jumgang | BRIG | BRIG | General de brigada | Phon Chattawa |
| O-8 | MG | MajGen | RADM | MajG | RADM | SES 4 | Thieu tu ong | De doc | Sojang | MAJGEN | MAJGEN | General de division | Phon Tri |
| O-9 | LG | LtGen | VADM | LtGe | VADM | SES 3 | Trung tu ong | Pho do doc | Jungiang | LTGEN | LTGEN | Teniente general | Phon Tho |
| O-10 | GEN | Gen | ADM | Gen | ADM | SES/ES | Dai tu ong | Do doc | Daejang | GEN | GEN | General de Ejercito | Phon Ek |
| O-11 | GOA | FADM | GA | SES/ES | Thong tu ong | Thuy su Do doc | Wonsu | FM | FM | Capitan general | Chom Phon | ||