| Ralph von Rettberg | |
| Birth Date: | 1 March 1911 |
| Death Place: | Munich |
| Serviceyears: | 1931–1945 |
| Rank: | Oberst (colonel) |
| Unit: | ZG 26, ZG 1 |
| Commands: | II./ZG 26 Zerstörergeschwader 1 Zerstörergeschwader 2 |
| Battles: | World War II |
| Awards: | Knight's Cross of the Iron Cross |
Ralph von Rettberg (1 March 1911 – 25 February 2004) was a World War II German Luftwaffe pilot and wing commander. As a fighter ace, he claimed eight enemy aircraft shot down.
On 7 April 1931, he began his pilot training at the Deutsche Verkehrsfliegerschule (DVS—German Air Transport School) at Schleißheim. He and 29 other trainees were part of Kameradschaft 31 (camaraderie of 1931), abbreviated "K 31". Among the members of "K 31" were future Luftwaffe staff officers Bernd von Brauchitsch, Günther Radusch, Günther Lützow, Wolfgang Falck and Hannes Trautloft. von Rettberg graduated from the DVS on 19 February 1932.
On 1 March 1937, von Rettberg was appointed adjutant to Oberst Kurt-Bertram von Döring, the Geschwaderkommodore (wing commander) of Jagdgeschwader 134 "Horst Wessel" (JG 134—134th Fighter Wing). On 1 April 1938, he was appointed Staffelkapitän of 1. Staffel (1st squadron), a squadron of I. Gruppe (1st group) of JG 134, which was based at Dortmund and commanded by Oberstleutnant Hermann Frommherz who was succeeded by Hauptmann Karl Kaschka on 1 February 1939. On 1 November 1938, I. Gruppe was renamed to I. Gruppe of Zerstörergeschwader 142 (ZG 142—142nd Destroyer Wing), a unit which became the I. Gruppe of Zerstörergeschwader 26 (ZG 26—26th Destroyer Wing) on 1 May 1939. In consequence, von Rettberg commanded the 1. Staffel of ZG 142, and later the 1. Staffel of ZG 26. The Gruppe was equipped with the Messerschmitt Bf 109 D-1 fighter. During the prelude of World War II in August 1939, I. Gruppe of ZG 26 deployed to an airfield at Varel.
On Friday 1 September 1939, German forces invaded Poland starting World War II in Europe. I. Gruppe of ZG 26 was tasked with patrolling the North Sea. In October, the Gruppe began equipping with the Messerschmitt Bf 110 C heavy fighter. In December, I. Gruppe was moved to Lippstadt. Von Rettberg was appointed Gruppenkommandeur (group commander) of II. Gruppe of ZG 26 on 1 April 1940. He let this unit during the Battle of France, Battle of Britain and the Invasion of Yugoslavia.
Mathews and Foreman, authors of Luftwaffe Aces — Biographies and Victory Claims, researched the German Federal Archives and state that Rettberg is credited with approximately eight aerial victories. This number includes three claims on the Eastern Front and five on the Western Front.
de:Kurt Braatz
. 2005 . Gott oder ein Flugzeug – Leben und Sterben des Jagdfliegers Günther Lützow . God or an Airplane – Life and Death of Fighter Pilot Günther Lützow . de . Moosburg, Germany . NeunundzwanzigSechs Verlag . 978-3-9807935-6-8 .de:Walther-Peer Fellgiebel
. 2000 . 1986 . Die Träger des Ritterkreuzes des Eisernen Kreuzes 1939–1945 — Die Inhaber der höchsten Auszeichnung des Zweiten Weltkrieges aller Wehrmachtteile . The Bearers of the Knight's Cross of the Iron Cross 1939–1945 — The Owners of the Highest Award of the Second World War of all Wehrmacht Branches . de . Friedberg, Germany . Podzun-Pallas . 978-3-7909-0284-6 .