Gau Cologne-Aachen (English Wikipedia)

MacDonald, Charles B. (1990) [1963]. "Chapter XXIII: The Geilenkirchen Salient". The Siegfried Line Campaign. US Army in World War II: European Theater of Operations. United States Army Center of Military History. pp. 551–555. CMH Pub 7-7-1. Archived from the original on 8 June 2010. Retrieved 22 January 2010.

battlefieldtours.nu

"The Battle of Geilenkirchen – Battlefield Tours". 2022-07-22. Retrieved 2023-08-19.

bilderbuch-koeln.de

"Kriegserinnerungen 1940". Archived from the original on 3 December 2012. Retrieved 1 May 2009.

books.google.com

Beck, Alfred M. (1985). United States Army in World War 2, Technical Services, The Corps of Engineers: The War Against Germany. Government Printing Office. ISBN 978-0-16-001938-8.
Zabecki, David T. (1999). World War II in Europe : an encyclopedia. New York: Garland Publications. p. 1644. ISBN 978-0824070298. Retrieved 20 February 2022.
Hart, Stephen Ashley (2000). Montgomery and "colossal cracks": the 21st Army Group in northwest Europe. Greenwood Press. p. 95. ISBN 0-275-96162-1.

dhm.de

"Die NS-Gaue" [The Nazi Gaue]. dhm.de (in German). Deutsches Historisches Museum. Retrieved 26 March 2016.

eschweilergeschichtsverein.de

Laufenberg, Haro von (2017-10-22). "Chronik zur Eschweiler Ortsgeschichte; Neueste und Zeitgeschichte 1930 - 1945". www.eschweilergeschichtsverein.de (in German). Retrieved 2023-08-24.

flightglobal.com

"Bomber Command Flight Archive". www.flightglobal.com. Archived from the original on 2015-01-10.

ga.de

Träupmann-Tietze, Susanne (2020-03-05). "Historischer Blick zurück: Die weiße Fahne beendet den Krieg in Rösberg". General-Anzeiger Bonn (in German). Retrieved 2023-08-24.
Manhold, Jörg (2020-04-09). "Kriegsende 1945: So endete am 9. April der Zweite Weltkrieg für Siegburg". General-Anzeiger Bonn (in German). Retrieved 2023-09-01.

gedenkbuch-wuppertal.de

"Christian J. Gabriel | Memorial Book of Wuppertal". www.gedenkbuch-wuppertal.de. Retrieved 2023-09-01.

glesch-online.de

"Glesch-Online-Geschichte & Statistiken". www.glesch-online.de. Retrieved 2023-08-24.

hans-dieter-arntz.de

"Hausweiler und Weilerswist: Mehrere US-Kriegsreporter berichten über die "Schlacht bei Metternich"". Hans-Dieter Arntz (in German). 2008-09-20. Retrieved 2023-08-24.

hgv-vettweiss.de

"Zeitzeugenberichte in Bearbeitung". www.hgv-vettweiss.de. Retrieved 2023-08-24.

in-gl.de

Müller, Hans Peter (2020-04-13). "Wie der Krieg zu Ende ging". Bürgerportal Bergisch Gladbach (in German). Retrieved 2023-09-01.

journalbelgianhistory.be

O'Connell 2013, p. 41. O'Connell, Vincent (2013). ""Left to Their Own Devices". Belgium's Ambiguous Assimilation of Eupen-Malmedy (1919–1940)" (PDF). Journal of Belgian History. 43 (4): 10–45.

koelnarchitektur.de

Stadtlandschaften versus Hochstadt at www.koelnarchitektur.de "Internet portal for the architecture of Cologne". (In German).

ksta.de

Norbert Kurt: Das Ziel war die Erft: Kölner Stadtanzeiger, 22. Februar 2005
"Zweiter Weltkrieg: "Das waren grauenvolle Tage"". Kölner Stadt-Anzeiger (in German). 2015-03-01. Retrieved 2023-08-24.

lvr.de

rheinische-geschichte.lvr.de

"Josef Grohé (1902–1987), Gauleiter der NSDAP" [Josef Grohé (1902–1987), Gauleiter of the Nazi Party]. rheinische-geschichte.lvr.de (in German). Landschaftsverband Rheinland. Retrieved 26 March 2016.
"Gau Köln-Aachen" [Gau Cologne-Aachen]. rheinische-geschichte.lvr.de (in German). Landschaftsverband Rheinland. Archived from the original on 22 October 2016. Retrieved 26 March 2016.

museenkoeln.de

"Cologne Museum: NS-DOK" (in German). Retrieved 16 June 2023.

nizkor.org

"The Organization of the Nazi Party & State". nizkor.org. The Nizkor Project. Archived from the original on 9 November 2016. Retrieved 26 March 2016.

overath.de

"geschichtlicher Überblick – Stadt Overath". www.overath.de. Retrieved 2023-09-01.

themayor.eu

Balgaranov, Denis (2023-08-15). "Drought is exposing World War II munitions on the banks of the Rhine". www.themayor.eu. Retrieved 2023-08-19.

vhs-rur-eifel.de

"VHS Rur-Eifel: Niederzier". www.vhs-rur-eifel.de. Retrieved 2023-08-24.

virtuelles-museum.com

"Frühjahrsoffensive 1945 in Erkelenz – Das Virtuelle Museum der verlorenen Heimat". www.virtuelles-museum.com (in German). Retrieved 2023-08-24.

warfarehistorynetwork.com

Marino, James (October 3, 2016). "Taking Hill 400: Army Rangers vs Fallschirmjägers". Warfare History. Archived from the original on 27 October 2019. Retrieved 19 April 2017.
says, Gunter G. Gillot (2023-02-24). "Operation Grenade: Race to the Roer". Warfare History Network. Retrieved 2023-08-19.

web.archive.org

"The Organization of the Nazi Party & State". nizkor.org. The Nizkor Project. Archived from the original on 9 November 2016. Retrieved 26 March 2016.
"Bomber Command Flight Archive". www.flightglobal.com. Archived from the original on 2015-01-10.
"Kriegserinnerungen 1940". Archived from the original on 3 December 2012. Retrieved 1 May 2009.
MacDonald, Charles B. (1990) [1963]. "Chapter XXIII: The Geilenkirchen Salient". The Siegfried Line Campaign. US Army in World War II: European Theater of Operations. United States Army Center of Military History. pp. 551–555. CMH Pub 7-7-1. Archived from the original on 8 June 2010. Retrieved 22 January 2010.
Marino, James (October 3, 2016). "Taking Hill 400: Army Rangers vs Fallschirmjägers". Warfare History. Archived from the original on 27 October 2019. Retrieved 19 April 2017.
"Gau Köln-Aachen" [Gau Cologne-Aachen]. rheinische-geschichte.lvr.de (in German). Landschaftsverband Rheinland. Archived from the original on 22 October 2016. Retrieved 26 March 2016.

wisoveg.de

"Bombenangriff auf Elsdorf". www.wisoveg.de. Retrieved 2023-08-24.

worcestershireregiment.com

"The Battle for Tripsrath". Worcestershire Regiment. Retrieved 22 Jan 2010.