| Born | 26 Oct, 1908 | Mönchen-Gladbach |
| Died | 3 Nov, 1994 |
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Ranks
Decorations |
Patrol info
| U-boat | Departure | Arrival | |||||
| 1. | U-71 | 14 Jun, 1941 | Kiel | 2 Jul, 1941 | St. Nazaire | Patrol, | 19 days |
| 2. | U-71 | 2 Aug, 1941 | St. Nazaire | 7 Sep, 1941 | St. Nazaire | Patrol, | 37 days |
| 3. | U-71 | 29 Sep, 1941 | St. Nazaire | 31 Oct, 1941 | St. Nazaire | Patrol, | 33 days |
| 4. | U-71 | 29 Nov, 1941 | St. Nazaire | 5 Dec, 1941 | St. Nazaire | 7 days | |
| 5. | U-71 | 18 Dec, 1941 | St. Nazaire | 21 Jan, 1942 | St. Nazaire | Patrol, | 35 days |
| 6. | U-71 | 23 Feb, 1942 | St. Nazaire | 20 Apr, 1942 | La Pallice | Patrol, | 57 days |
| 7. | U-71 | 4 Jun, 1942 | La Pallice | 6 Jun, 1942 | La Pallice | 3 days | |
| 8. | U-71 | 11 Jun, 1942 | La Pallice | 20 Jun, 1942 | St. Nazaire | Patrol, | 10 days |
| 6 patrols, 191 days at sea | |||||||
Ships hit by Walter Flachsenberg
| Date | Boat | Name of ship | Tons | Nat. | Convoy | Fate * | |
| 17 Mar, 1942 | U-71 | Ranja | 6.355 |  | nw | ||
| 20 Mar, 1942 | U-71 | Oakmar | 5.766 |  | am | ||
| 26 Mar, 1942 | U-71 | Dixie Arrow | 8.046 | | am | ||
| 31 Mar, 1942 | U-71 | San Gerardo | 12.915 |  | br | ||
| 1 Apr, 1942 | U-71 | Eastmoor | 5.812 | | br | ||
| 38.894 | |||||||
* Unless otherwise noted the ships listed here were sunk. | |||||||
Decorations and ranks information is in many cases not complete. If you can help on any of those missing that would be great.