Nickname: No information
Date of Birth: 30.11.1897 - Borntin, Farther Pomerania (German Empire)
Date of Death: 21.04.1945 - Groß Brunsrode near Braunschweig, Niedersachsen (Nazi Germany)
Battles and Operations: World War I (East Prussia, Poland, Russia, Courland, Western Front including Battle of Lys), Polish Campaign, Battle of France, Balkans Campaign, Operation Barbarossa, defensive battles on the Eastern Front (including Rogachev, Kovel), Ruhr Pocket
NSDAP-Number: No information
Religion: No information
Parents: Son of an officer (name unknown)
Siblings: No information
Spouse: No information available
Children: No information available
Promotions:
03.08.1914 Fahnenjunker (entered service)
08.05.1915 Fähnrich
12.07.1915 Leutnant
31.07.1925 Oberleutnant
01.05.1931 Rittmeister
01.03.1936 Major
01.04.1939 Oberstleutnant
01.02.1942 Oberst
01.12.1943 Generalmajor
01.06.1944 Generalleutnant
27.12.1944 General der Panzertruppe
Career:
03.08.1914: joined the military service and sent to East Prussia
Soon promoted to an officer candidate for bravery before the enemy
1915: fought in Poland, Russia and Courland (now Latvia)
1916: served as Zugführer (platoon leader) of a machine gun unit after he was transferred to the Feldkriegsschule of the German 8th Army
04.1917: transferred to the Western Front and fought in the Battle of Lys where his division suffered heavy casualties
1917: Leutnant and battalion adjutant
1918: weapons instructor assigned to the Infantry School in Döberitz
1920: accepted into the Reichswehr and served with the 29th Reserve Jäger Regiment, the 5th Jäger Regiment and the 6th cavalry Regiment
He was promoted to Oberleutnant and Rittmeister during these assignments in 1925 and 1931.
1936: Major, he was transferred to the staff of the 5th Cavalry Regiment together with Horst Niemack.
Shortly afterwards, he was reassigned again, this time to the 38th Armoured Detachment in Mühlhausen. He later became the commanding officer of this unit.
1939: his unit was subordinated to the 2nd Panzer division during the Invasion of Poland and fought under the command of Decker near Kraków and the Jablonka Pass.
1940: during the Battle of France, Decker commanded a battalion of the 3rd Panzer regiment in the 2nd Panzer division. This unit fought at the Maas, near Sedan, Saint-Quentin and Abbeville.
1941: in Balkans Campaign, his regiment fought in Yugoslavia, northern Greece, occupied Athens and crossed the Corinth Canal. 05.1941: put in command of 3rd Panzer regiment for Operation Barbarossa
04.1942: transferred to the staff of the 9th Army
04.1943: appointed commander of the 5th Panzer Division
04.05.1944: received the Oak Leaves to the Knight's Cross and promoted to Generalleutnant.
01.01.1945: appointed commander of the XXXIX Panzer Corps that was attached to the 3rd Panzer Army and promoted to General der Panzertruppe
After his unit was relocated to the Western Front, his corps fought the Americans at Uelzen and in the Alsace. Here the 5th Panzer Army was subordinated to Army Group B.
21.04.1945: committed suicide after the defeat and encirclement of the Army Group in the Ruhr Pocket in April.
Awards and Decorations:
Eisernes Kreuz 2. Klasse 1914 (22.06.1915)
Eisernes Kreuz 1. Klasse 1914 (01.11.1916)
Hamburgisches Hanseatenkreuz (20.12.1917)
Ehrenkreuz für Frontkämpfer (1934)
Dienstauszeichnung der Wehrmacht 4. Klasse (02.10.1936)
Dienstauszeichnung der Wehrmacht 1. Klasse (03.08.1939)
1939 Spange zum Eisernen Kreuz 2. Klasse (27.09.1939)
1939 Spange zum Eisernen Kreuz 1. Klasse (20.11.1939)
Verwundetenabzeichen 1939 in Schwarz (26.06.1940)
Panzerkampfabzeichen (01.06.1940, later in bronze with 25)
Ritterkreuz des Eisernen Kreuzes #306 (13.06.1941) as Oberstleutnant and Kommandeur I.Abteilung / Panzer-Regiment 3 / 2.Panzer-Division. In the thrust toward central Greece, Decker led elements of Kampfgruppe Balck from the front. On 18 April 1941, his panzers approached the Pinios River, a natural barrier defended by determined Australian and New Zealand troops in fortified positions. Under fire, Decker's forces forced a crossing of the river amid contested terrain. Once across, they launched a fierce armored assault that shattered the Allied defensive line. The breakthrough allowed a rapid advance toward Larissa, threatening the rear of the enemy positions on the Olympus line. This pressure forced the Allied forces to abandon their strongholds on Olympus to avoid encirclement.
Earlier in the campaign, Decker's unit smashed through Yugoslav defenses in the Strumica basin. These actions opened the path for the entire 2. Panzer-Division's drive to Salonika (Thessaloniki), accelerating the collapse of resistance in northern Greece. Decker's personal bravery—leading from the vanguard, maintaining momentum under pressure, and exploiting tactical opportunities—proved decisive in a fast-moving campaign characterized by rugged mountains, river crossings, and stubborn rearguard actions by Commonwealth troops.
Medaille Winterschlacht im Osten 1941/42 (15.07.1942)
Deutsches Kreuz in Gold #154/1 (01.08.1942) as Oberst and Kommandeur Panzer-Regiment 3
Mentioned in Wehrmachtbericht (11.12.1943) : "The Mecklenburg-Pomeranian 292nd Infantry Division under Major General John and the Silesian 5th Panzer Division under Major General Decker deployed in the middle front sector of have played a prominent part in the defensive successes achieved on the middle sector of the front during the last few weeks."
Mentioned in Wehrmachtbericht (02.03.1944) : "The Silesian 5th Panzer Division under the leadership of Major General Decker along with its subordinated infantry, armor, and anti aircraft artillery detachments have proven themselves exceptionally in these battles."
Ritterkreuz des Eisernen Kreuzes mit Eichenlaub #466 (04.05.1944) as Generalmajor and Kommandeur 5. Panzer-Division. The following wartime excerpt describes why Decker was awarded the Eichenlaub:
“For the outstanding leadership of the 5. Panzer-Division north of Rogatschew in the time period 22.02.-21.03.1944 and the subsequent relief battles at Kovel. On the morning of the 05.04.1944 contact was established with an outermost strongpoint of Fortress Kovel; the villages of Dubowa and Rudniki (northwest of the city) were taken.”
The following press article, dated 08.05.1944, provides further details as to these actions:
“At the end of February 1944 the Soviets achieved a penetration north of Rogatschew, and in response the 5. Panzer-Division was thrown into battle in a piecemeal fashion as soon as each Bataillon arrived. In order to buy time for the arrival of further forces Generalmajor Decker created a thin, strongpoint-like defensive front that initially halted the enemy advance. However on the next day the Soviets attacked the weak elements of the 5. Panzer-Division with 3 of their own divisions. They launched an enveloping thrust through a gap in the German frontline with strong forces and proceeded to a key German position along the Pruth river. To deal with this the divisional commander rushed to the threatened site with a handful of reserves, a few heavy Pak guns and a Kompanie of Pioniere. He set up a defense just before the Soviets arrived and in the ensuing battle, during which he personally fought in the foremost line and positioned the Paks, he and his men defeated all enemy attacks until the arrival of friendly reinforcements. A few days later, on the 02.03.1944, the Wehrmachtbericht reported that in this fighting the Silesian 5. Panzer-Division under the command of Generalmajor Decker had outstandingly acquitted itself. This was the second time within three months that Generalmajor Decker and his Division had been named in the Wehrmachtbericht.”
Mentioned in Wehrmachtbericht (05.08.1944) : "The Silesian-Sudeten 5th Panzer Division under the leadership of Lieutenant General Decker distinguished itself by showing excellent attacking spirit in the battle area southwest of Kaunas."
Mentioned in Wehrmachtbericht (12.10.1944) : "The Silesian-Sudeten 5th Panzer Division under the leadership of Lieutenant General Decker distinguished itself again by showing excellent fighting spirit in the heavy defensive fighting north of the Memel."
Ritterkreuz des Eisernen Kreuzes mit Eichenlaub und Schwertern #149 (posthumous recommendation / 26.04.1945 as per some sources) as General der Panzertruppe and Kommandierender General XXXIX. Panzerkorps. By early 1945 the corps had transferred to the Western Front under Army Group B. It fought delaying actions against advancing American forces in areas such as Uelzen and Alsace before becoming trapped in the Ruhr Pocket.
Detailed contemporary citations for the award are limited, as the award came in the chaotic final weeks of the war (some sources note it as posthumous or recommended around 26 April 1945, after Decker's suicide on 21 April). His leadership involved skillful armored counterattacks and rearguard actions to delay overwhelming Allied advances, attempting to maintain cohesion amid fuel shortages, air supremacy by the Allies, and collapsing supply lines. The Ruhr Pocket fighting featured desperate breakout attempts, urban combat in industrial areas, and encirclement by superior U.S. forces. Decker's corps resisted fiercely until the pocket's collapse, after which he chose suicide rather than surrender.
The German Federal Archives hold no records for the presentation of the Schwerter to Karl Decker. The Association of Knight's Cross Recipients (OdR) assumes that the presentation fell into the timeframe 20 April 1945 to 29 April 1945. It is assumed that the nomination was approved on 26 April 1945. Veit Scherzer states that the assumption is based on a statement from Decker's widow. She claimed that she had been informed that her husband had received the award. The date and sequential number "149" were assigned by the OdR.
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Karl Gustav Adolf Decker was a German general in the Wehrmacht during the Second World War who rose to the rank of general der panzertruppe. Born on 30 November 1897 in Borntin in farther pomerania as the son of an officer he entered military service as a volunteer on 3 August 1914 shortly after the outbreak of the First World War. He saw his first combat in east prussia and earned rapid promotion to officer candidate for bravery before the enemy. By 1915 he fought in poland russia and courland before serving as a platoon leader in a machine gun unit after attending the field war school of the eighth army. Transferred to the western front in 1917 he participated in the battle of lys as a battalion adjutant and later served as a weapons instructor at the infantry school in döberitz in 1918. After the armistice he was accepted into the reichswehr where he gained experience in cavalry and early armored units serving with jäger regiments and the sixth cavalry regiment.
Decker steadily advanced through the interwar ranks becoming rittmeister in 1931 major in 1936 and oberstleutnant in 1939. He commanded the 38th armored detachment in mühlhausen which was subordinated to the second panzer division during the invasion of poland in 1939 where his forces engaged near kraków and the jabłonka pass. In the battle of france in 1940 he led a battalion of panzer regiment 3 fighting at the maas river near sedan saint quentin and abbeville demonstrating skill in armored breakthroughs. During the balkans campaign in 1941 his regiment advanced through yugoslavia and northern greece occupying athens and crossing the corinth canal. On 18 april 1941 decker distinguished himself at the head of kampfgruppe balck by forcing a crossing of the pinios river breaking through australian and new zealand fortified lines and thrusting toward larissa. This action forced the enemy to abandon the olympus position. His earlier smashing of yugoslav defenses in the strumica basin also enabled the division drive to salonika. For these feats he received the knights cross of the iron cross on 13 june 1941.
Following the balkans decker commanded panzer regiment 3 at the start of operation barbarossa earning the german cross in gold in august 1942. In april 1943 he assumed command of the fifth panzer division a silesian formation. He led the division with distinction in defensive operations on the eastern front particularly during the winter and spring of 1944. North of rogachev in late february 1944 soviet forces penetrated the line and decker committed his units piecemeal to stabilize the front. When three soviet divisions attacked he rushed reserves heavy antitank guns and pioneers to a threatened sector along the pruth river personally directing the defense from the foremost line and repelling repeated assaults until reinforcements arrived. His division later participated in relief operations at kovel establishing contact with outer strongpoints and capturing villages northwest of the fortress on 5 april 1944. These actions earned him the oak leaves to the knights cross on 4 may 1944 and promotion to generalleutnant. The fifth panzer division received multiple mentions in the wehrmachtbericht under his leadership for its fighting spirit in battles southwest of kaunas and north of the memel.
In late 1944 decker was promoted to general der panzertruppe on 27 december and took command of the thirty ninth panzer corps attached to the third panzer army. The corps transferred to the western front in early 1945 where it conducted delaying actions against american forces in the uelzen area and alsace. Subordinated to army group b the formation became trapped in the ruhr pocket amid overwhelming allied pressure fuel shortages and constant air attacks. Despite fierce resistance and attempts at breakout the pocket collapsed in april 1945. On 21 april 1945 decker committed suicide near groß brunsrode in lower saxony to avoid capture as his forces faced total encirclement. Some sources indicate he was recommended for or posthumously awarded the swords to the knights cross with oak leaves around 26 april 1945 recognizing his final leadership in the desperate defense.
Throughout his career decker was noted for leading from the front combining personal courage with tactical competence in both offensive maneuvers and tenacious defensive fighting. From the mobile campaigns of 1939 to 1941 to the attritional battles on the eastern front and the collapse in the west he exemplified the professional wehrmacht officer dedicated to duty amid increasingly hopeless conditions. His decorations reflected repeated recognition for decisive actions that stabilized critical sectors or accelerated advances against determined opposition. Decker remained a frontline commander until the end never seeking rear echelon positions even as germany position deteriorated. His death at age 47 marked the end of a military life that spanned two world wars and the transformation of the german army from cavalry traditions to panzer warfare.
Decker place in history rests among the capable panzer leaders of the wehrmacht whose skills prolonged german resistance but could not alter the strategic outcome of the war. His service illustrated the demands placed on mid level and senior officers in mechanized operations across diverse theaters from the mountains of greece to the plains of russia and the industrial ruhr. Postwar accounts highlight his professionalism and the respect he earned from subordinates for his steady command under fire. Though little personal detail survives about his family or private life his military record stands as a testament to the experiences of a generation of german officers shaped by the conflicts of the twentieth century.
Source:
https://en.wikipedia.org/wiki/Karl_Decker
https://www.tracesofwar.com/persons/3351/Decker-Karl-Gustav-Adolf.htm
https://www.lexikon-der-wehrmacht.de/
https://grokipedia.com/page/karl_decker
https://rk.balsi.de/index.php?action=list&cat=300
https://www.unithistories.com/units_index/index.php?file=/officers/personsx.html
http://www.geocities.ws/orion47.geo/WEHRMACHT/HEER/General/DECKER_KARL.html (archived)
https://forum.axishistory.com/
https://www.wehrmacht-awards.com/forums/
https://www.geni.com/
Scherzer, Veit. Die Ritterkreuzträger 1939-1945. Jena 2007.
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