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Otto Karl Gruenbaum
| Otto Karl Gruenbaum | |
|---|---|
 | |
| Personal details | |
| Born | 18 August 1918 Vienna, Austria |
| Died | 18 November 1945 Schongau, Germany |
| Nativity | Austria |
| Religion | Protestant |
| Awards | Purple Heart |
| Military service | |
| Allegiance |  United States |
| Branch |  United States Army |
| ASN | 32527211 |
| Rank | Master Sergeant |
| Rank at Ritchie | Technician Fifth Grade |
| Camp Ritchie | Class 20 (19 June – 16 August 1944) |
| Section | 5B |
| Enlisted | Ft Jay Governors Island, New York |
| Team | IPW 120 |
|
| Purple Heart |
{{Needs source}}, or explain disagreements on talk. Baseline import notes: About the data.
Otto Karl Gruenbaum (18 August 1918 – 18 November 1945) was a Vienna-born concert pianist and Ritchie Boy who trained at Camp Ritchie, Maryland, in Class 20 and served as an interrogator and translator with IPW Team 120 and the 14th Armored Division; he died near Schongau, Germany, months after the war. Otto enlisted at Ft Jay Governors Island, New York.
Biography[edit | edit source]
Otto Karl Gruenbaum (born Grünbaum, also spelled Greenbaum) was born on 18 August 1918 in Vienna, Austria, the second of two children. His father, a Jewish furrier and former Austrian Army non-commissioned officer, and his Catholic mother raised him in a musical household; Army records list him as Protestant. He attended a Gymnasium in Vienna, studied piano at the Vienna Conservatory of Music from age ten, and was performing as a pianist by fourteen. After the Anschluss in March 1938 he left Austria in May under the pretext of a piano competition in Brussels, reached Paris as a refugee, and sailed from Le Havre to New York; he later continued his studies in Paris and in New York under Arthur Schnabel. In New York he worked as a piano student and teacher and as a solo pianist and accompanist, gave Carnegie Hall and Town Hall recitals, toured as an accompanist, and married Susanne Hohenberg in February 1942.
Gruenbaum was drafted at Fort Jay, New York, in October 1942 and probably took basic training at Seymour Johnson Field in Goldsboro, North Carolina, where he served as a medical aide in the Medical Detachment. From January 1943 he was a medical and chemical laboratory technician in the Medical Detachment of Army Air Forces Basic Training Center No. 7 in Atlantic City, New Jersey, and became a United States citizen; in July 1943 he was assigned in the same role to the 1272nd Service Command Service Unit at the new Thomas M. England General Hospital in Atlantic City, where he also entertained the troops. In May 1944 he was transferred to the Military Intelligence Training Center at Camp Ritchie and trained as a prisoner-of-war interrogator in Class 20 (section 5B, IPW German; certificate 7995), specializing as a linguist.
After a temporary assignment to IPW Team 316, Gruenbaum sailed for Europe in October 1944 and through the 12th Replacement Depot near Birmingham, England, was assigned in November 1944, in the Seventh U.S. Army area at Épinal, France, to IPW Team 120 of the Field Interrogation Detachment, Military Intelligence Service. He interrogated German prisoners and civilians and worked as a translator with Combat Command A of the 14th Armored Division in the Vosges, the Haguenau Forest, and Alsace, where near the Moder River he also broadcast propaganda in German by loudspeaker. In the spring of 1945 he crossed the Siegfried Line into the Rhineland and Bavaria, and after the liberation he screened people for the Military Intelligence Service and the Counter Intelligence Corps at Third U.S. Army headquarters. He received the Purple Heart. His last rank was master sergeant. He died under unexplained circumstances during a mountain hike near Schongau, Germany; his official date of death is 18 November 1945.
Gallery[edit | edit source]
-
Otto K. Gruenbaum playing piano in wartime uniform (RB Archive) -
Otto K. Gruenbaum interrogating a German prisoner who surrendered after a propaganda broadcast, 5 March 1945 (RB Archive)
Timeline[edit | edit source]
- 18 August 1918 — Born in Vienna, Austria.
- 11 August 1939 — Sailed from Le Havre for the United States.
- February 1942 — Married Susanne Hohenberg in New York.
- October 1942 — Drafted at Fort Jay, New York (ASN 32527211); medical-detachment duty at Goldsboro, North Carolina.
- January 1943 — Medical Detachment, AAF Basic Training Center No. 7, Atlantic City, New Jersey; naturalized.
- July 1943 — 1272nd SCSU, England General Hospital, Atlantic City, New Jersey.
- May 1944 — Transferred to Camp Ritchie; Class 20 (section 5B, IPW German). Certificate # 7995.
- October 1944 — Sailed for Europe.
- November 1944 — IPW Team 120, Seventh Army, Épinal; Combat Command A, 14th Armored Division.
- Spring 1945 — Rhineland and Bavaria; screening at Third Army headquarters.
- 18 November 1945 — Died near Schongau, Germany.
- March–May 1938 — Left Vienna after the Anschluss for a piano competition in Brussels; reached Paris.
Technical record[edit | edit source]
| Field | Imported value |
|---|---|
| Approx Age at Death | 27 |
| Nara ASN | 32527211 |
| Nara Name | GRUENBAUM OTTO K |
| Nara State | 23 |
| Nara County | 61 |
| Nara POE | 2327 |
| Nara DOE | 121042 |
| Nara Grade Alpha | PVT |
| Nara Grade Code | 8 |
| Nara Branch Alpha | BI |
| Nara Branch Code | 0 |
| Branch | Branch Immaterial - Warrant Officers, USA |
| Nara Term or Enlistment | 5 |
| Term of enlistment | Enlistment for the duration of the War or other emergency, plus six months, subject to the discretion of the President or otherwise according to law |
| Defer. Date | 0 |
| Nara Source | 0 |
| Nara Nativity | N2 |
| Nara Year of Birth | 18 |
| Nara Race | J |
| Nara Race Description | White not yet a citizen |
| Nara Education | 4 |
| Nara Civilian Occupation | 24 |
| Nara Marital Status | 6 |
| Nara Height (inches) | 70 |
| Nara Weight (lbs) | 174 |
| Class_ASN | 32527211 |
| Class_Name | GRUENBAUM, Otto |
| match_method | asn_exact_name_exact |
| row_source | both |
Research notes[edit | edit source]
- 3rd Army
- Folder spelling is Greenbaum
- roster and wartime press use Gruenbaum. Alias/Greenbaum retained in the opening sentence. Live rank_final Captain is not reasserted
- class rank and 1943 press place him as a corporal/T/5-era enlisted soldier. Purple Heart retained from the live awards block and research notes
- The Austriansoldiers biography dates his sailing from Le Havre, on a student visa, to August 1938; the page's earlier date of 11 August 1939 is kept pending review.
- Last rank Master Sergeant per the Austriansoldiers biography (replaces the unsupported Captain value).
Sources[edit | edit source]
- Otto K. Gruenbaum interrogating a German prisoner who surrendered after a propaganda broadcast, 5 March 1945 (RB Archive)
- Otto K. Gruenbaum playing piano in wartime uniform (RB Archive)
- Irene Wittig, Almost Home — Otto Gruenbaum biography (RB Archive notes)
- RB Archive clipping, The Beam (England General Hospital, Atlantic City), 9 October 1943 — “Soldier Pianist Fled from Nazis’ Terror in Vienna”
- Camp Ritchie Museum, Inc. (The Ritchie History Museum), Classes 1–31 roster data
- Dan Gross research spreadsheets, including original Excel timeline/roster work, combined with other research and records
- NARA World War II Army enlistment records (where a NARA ASN is present)
- 1940 U.S. Census (where a census match is present)
- Dan Gross, Timeline of Otto K. Gruenbaum for Camp Ritchie (private research document; 1 source documents reviewed)
- Dan Gross, Timeline of Gruenbaum, Otto K. for Camp Ritchie (private research files; selected non-private narrative findings; 1 source files: OTTO GRUENBAUM.doc)
- Austriansoldiers biography: Otto K. Gruenbaum, Austriansoldiers / Ludwig Boltzmann Institute for Research on Consequences of War (in German; accessed 25 September 2026)
- Otto K. Gruenbaum in uniform (photo: Irene Wittig)