Fallen Brothers: O

9th Infantry Division
| LAST NAME | GIVEN NAMES | RNK | CITY | STATE | DATE | NOTES | 9th INF DIV UNIT | LOCATION |
|---|---|---|---|---|---|---|---|---|
| O'BRIEN | WILLARD DONALD | SP4 | Tucson | Arizona | 700511 | FO 6/31 | D Btry 2nd Bn 4th Arty | Cambodia |
| O'CONNOR | DENNIS KENNETH | SGT | San Francisco | California | 681101 | B Co 3rd Bn 60th Inf | Dinh Tuong | |
| O'DONNELL | JOHN MICHAEL | SGT | Long Island City | New York | 690523 | B Co 3rd Bn 60th Inf | Kien Hoa | |
| O'DONNELL | ROBERT WAYNE | PVT | Cheboygan | Michigan | 680312 | HHC 9th Inf Div | unknown | |
| O'GRADY | MARTIN EDWARD | PFC | Jackson Heights | New York | 680108 | B Co 3rd Bn 60th Inf | Long An | |
| O'NEAL | JAMES ELTON | SGT | Millington | Tennessee | 671124 | E Co 2nd Bn 39th Inf | Bien Hoa | |
| O'NEAL | NELSON MONTAGUE | CPL | Gallatin | Tennessee | 680108 | B Co 2nd Bn 60th Inf | Long An | |
| O'REILLY | ANTHONY PAUL | 1LT | Kettering | Ohio | 680603 | DSC | A Co 2nd Bn 39th Inf | Kien Tuong |
| O'STEEN | CHARLES ROBERT | SSG | Jacksonville | Florida | 690205 | HHC 15th Eng Bn | Kien Tuong | |
| O'TOOLE | GERALD ARNOLD | CPL | San Antonio | Texas | 680120 | B Co 4th Bn 47th Inf | Vinh Long | |
| OAKES | ARNOLD GLEN | PFC | Spencer | Tennessee | 690123 | D Co 4th Bn 47th Inf | Dinh Tuong | |
| OAKES | PAUL LAVERNE JR | 1LT | Atlantic | Iowa | 680619 | A Co 3rd Bn 60th Inf | Phong Dinh | |
| OCHOA | LUPE P | SP4 | San Antonio | Texas | 680824 | A Co 4th Bn 47th Inf | Dinh Tuong | |
| OCHOA | ROBERT | CPL | Corpus Christi | Texas | 671121 | E Co 2nd Bn 39th Inf | Kien Tuong | |
| OCKEY | BRUCE GORDON | PFC | Pittsburgh | Pennsylvania | 670630 | A Co 3rd Bn 39th Inf | Long An | |
| OGDEN | EDWARD PAUL | SP4 | Dallas | Texas | 690123 | D Co 2nd Bn 47th Inf | Long An | |
| OKER | DAVID PAUL | PFC | Isanti | Minnesota | 690120 | A Co 3rd Bn 39th Inf | Dinh Tuong | |
| OLEA | FRANCISCO HERRERA | CPL | Ajo | Arizona | 681009 | B Btry 2nd Bn 4th Arty | Long An | |
| OLIVER | BOBBY GLENN | SGT | Knoxville | Tennessee | 690611 | D Co 2nd Bn 60th Inf | Dinh Tuong | |
| OLIVER | GARY LEE | PFC | Ashland City | Tennessee | 680301 | C Co 5th Bn 60th Inf | Dinh Tuong | |
| OLIVERAS | RUDY MICHAEL | SGT | Colton | California | 680601 | C Co 2nd Bn 39th Inf | Long An | |
| OLSEN | GREGORY JON | CPL | Franklin | Wisconsin | 690525 | E Co 2nd Bn 39th Inf | Dinh Tuong | |
| OLSEN | JOHN ANDREW | 1LT | St James | New York | 690509 | B Co 3rd Bn 39th Inf | Dinh Tuong | |
| OLSEN | WILLIAM WHITBY | SGT | Pocatello | Idaho | 690523 | B Co 3rd Bn 60th Inf | Kien Hoa | |
| ONLEY | CLAUDE ALOYSIUS | PSGT | Washington | Dist Columbia | 670211 | A Co 3rd Bn 47th Inf | Bien Hoa | |
| OPLINGER | DAVID PAUL | SGT | Allentown | Pennsylvania | 670616 | A Co 5th Bn 60th Inf | Long An | |
| ORGERON | PHILIP JOSEPH | PFC | Thibodaux | Louisiana | 700706 | A Co 2nd Bn 60th Inf | Tay Ninh | |
| ORNELAS-ARELLANO | VICTOR M | SP4 | Escondido | California | 681003 | E Co 2nd Bn 39th Inf | Long An | |
| ORR | MICHAEL WALTER | PFC | Grand Rapids | Michigan | 680113 | B Co 2nd Bn 47th Inf | Bien Hoa | |
| ORTIZ | LAWRENCE JR | CPL | Houston | Texas | 681219 | B Co 4th Bn 39th Inf | Dinh Tuong | |
| OSBORN | BARRY LEE | SGT | Brownsburg | Indiana | 690703 | D Co 2nd Bn 60th Inf | Long An | |
| OSBORN | EARL DOUGLAS | SP4 | Council Bluffs | Iowa | 681011 | C Co 9th Signal Bn | Long An | |
| OSBORNE | GEORGE D | SGT | Murfreesboro | Tennessee | 681004 | B Co 1st Bn 16th Inf | Dinh Tuong | |
| OSBORNE | JAKE | PFC | Beattyville | Kentucky | 690612 | D Co 3rd Bn 60th Inf | Vinh Binh | |
| OSBORNE | THOMAS YORK | 1LT | Harrisburg | North Carolina | 680214 | C Btry 1st Bn 11th Arty | Gia Dinh | |
| OSCAR | CECIL THOMAS | CPL | Grottoes | Virginia | 680606 | C Co 3rd Bn 39th Inf | Dinh Tuong | |
| OSCELUS | JOHN ALBERT | SGT | Cumbola | Pennsylvania | 680411 | A Co 2nd Bn 39th Inf | Dinh Tuong | |
| OSTENSON | RONALD LE ROY | PFC | Cicero | Illinois | 690201 | A Co 2nd Bn 60th Inf | Long An | |
| OTT | ALAN ROBERT | CPL | Au Gres | Michigan | 680603 | A Co 2nd Bn 39th Inf | Dinh Tuong | |
| OWEN | DEAN GILMAN | SP5 | Camp Springs | Maryland | 680406 | A Co 15th Eng Bn | Dinh Tuong | |
| OWENBY | CLYDE | SP4 | Hiawassee | Georgia | 670622 | A Co 2nd Bn 47th Inf | Kien Tuong | |
| OWENS | ALBERT DANNY | WO | Mount Shasta | California | 690608 | A Co 9th Avn Bn | Dinh Tuong | |
| OWENS | THOMAS EARL | PFC | Wetumpka | Alabama | 690613 | B Co 2nd Bn 47th Inf | Long An | |
| OWENS | VERNELL | PFC | Corona | New York | 680617 | C Co 3rd Bn 47th Inf | Phong Dinh | |
| OYOLA-RABAGO | ANIBAL | CPL | Hato Rey | Puerto Rico | 671223 | A Co 4th Bn 47th Inf | Dinh Tuong |