The Freikorps Hülsen (or Freikorps von Hülsen) was raised on 26 December 1918 and saw action against the spartacist rising in Berlin. It once again saw action in Berlin in March 1919 and in Leipzig in May.
It was used to form Reichswehr-Brigade 3 together with Freikorps Potsdam June 1919.

Commanders

Generalleutnant Bernhard von Hülsen

Formed in the area of

Generalkommando III. Armeekorps Berlin (Provinz Brandenburg)

Manpower strength

13.257

Order of battle

Detachement Graf Stillfried
Detachement Grote
Detachement Oven (also Abteilung Oven) (Oberst Burghard von Oven)
Freiw.Btl. Osterroht
MG-Abteilung
Feldart.Abt.
Kav.Abt.
Flieger-Abteilung 432

Notable members

Generalleutnant Albrecht Baier (in Artillerie-Abteilung Hederich)
Generalleutnant Hans Behrendt (Luftwaffe) (leader of Flieger-Abteilung 432)
SS-Obergruppenführer Theodor Berkelmann
SS-Gruppenführer und Generalleutnant der Waffen-SS Willi Bittrich
General der Infanterie Herbert von Böckmann
Generalmajor Theodor Bohlmann-Combrinck (in Detachement Oven)
Generalmajor Hellmuth Dorn
Generalleutnant Otto Drescher
General der Panzertruppe Maximilian Reichsfreiherr von Edelsheim
Generalmajor Dr. Johann-Volkmar (Hans) Fisser (Luftwaffe) (in the Fliegerstaffel)
Generalmajor Hermann Fricke (Luftwaffe) (leader of the Flieger-Abteilung and later of the MG-Abteilung)
Generalmajor Hermann Grothe (in Detachement Oven)
Generalmajor Dipl. Ing. Franz Habicht
Generalmajor Erich Hempel (in Detachement Oven)
Generalleutnant Hans-Georg Hildebrandt
Generalleutnant Harry Hoppe (in Detachement Grothe)
General der Infanterie Walter von Hülsen
SS-Gruppenführer Leo von Jena (in Detachement Oven)
Generalmajor Otto Jordan (Luftwaffe) (in Flieger-Abteilung 432)
General der Infanterie Eberhard Kinzel (in Detachement Oven)
Generalmajor Fritz Löb (Luftwaffe) (in Detachement Oven)
Generalmajor Kurt Lottner (in Detachement Oven)
General der Panzertruppe Hasso von Manteuffel (in Detachement Oven)
SS-Oberführer Hans Scheider (Waffen-SS)
SS-Oberführer Erich Schrage
General der Infanterie Rudolf Schmundt (in Detachement Graf Stillfried)
Generalleutnant Walter Schwabedissen (Luftwaffe)
Generalmajor Rudolf Siber (Luftwaffe)
Generalmajor Paul Weitkus (Luftwaffe)
(the ranks are the highest ranks reached in the Third Reich era)

Insignia

Oak leaves on the collar

Soldiers of Freikorps Hülsen in Berlin during the Kapp Putsch

(Courtesy of Måns)

Soldier of Freikorps Hülsen

(Courtesy of WW)

Armored train of Freikorps Hülsen

(Courtesy of Måns)

Defense Minister Gustav Noske visiting Freikorps Hülsen in January 1919

(Courtesy of Bundesarchiv/Wikimedia, licensed under Creative Commons Attribution ShareAlike 3.0 Germany)

Recruitment poster

(Courtesy of United States Library of Congress)

Sources used

Verkuilen Ager - Awards of the German Freikorps 1919-1935
Nigel Jones - The birth of the Nazis: How the Freikorps blazed a trail for Hitler
Georg Tessin - Deutsche Verbände und Truppen 1918-1939
Charles Woolley - German Uniforms, Insignia & Equipment 1918-1923

Reference material on this unit

Bernhard von Hülsen - Der Kampf um Oberschlesien