Kammala jumla mai zuwa: Armyungiyar Sojoji ta 21 ita ce ƙungiyar hedkwatar Biritaniya ta Yaƙin Duniya na II, a ƙarƙashin umarnin rundunonin soja biyu da sauran rukunin tallafi, waɗanda suka ƙunshi galibi Sojojin Burtaniya na Biyu da Sojojin Kanada na Farko. An kafa shi a London a watan Yulin 1943, a karkashin umarnin Babban Ofishin Jakadancin Allied Expeditionary Force (SHAEF), an sanya shi zuwa Operation Overlord,
Yammacin Allied mamaye Turai, kuma ya kasance muhimmin ƙarfin Allied a cikin Turai Theater. A lokuta daban-daban a yayin wanzuwarsa, Armyungiyar Sojoji ta 21 tana da ƙarin sojojin Burtaniya, Kanada, Amurka da Poland da ke da alaƙa da ita. Armyungiyar Sojoji ta 21 ta yi aiki a Arewacin Faransa, Luxembourg, Belgium, Netherlands da Jamus daga Yuni 1944 zuwa Agusta 1945, lokacin da aka sake masa suna Sojojin Burtaniya na Rhine (BAOR).