Whakaotihia te rerenga e whai ake nei: I te tīmatanga, i whakahaerehia e te Rōpū 21 o te ope taua nga ope whenua katoa i te Operation Overlord. Ko nga waahanga nui o te 21 Army Group ko te British 2nd Army me te First Canadian Army. I whakauruhia hoki nga waeine Polish me Normandy mai i tua atu me nga waahanga iti o Dutch, Belgian, me Czech. Heoi, ko nga waahanga o nga Raina Whakawhitiwhiti korero ko te nuinga o Ingarangi. Ko etahi atu ope i uru ki raro i te mana o te 21 Army Group ko te First Allied Airborne Army, te US Army Tuatahi mo Overlord, me te US Ninth Army; na te raru o te mekameka whakahau i te Pakanga o te Bulge me te whakapakari mo te taraiwa ki te Rhine, Operation Veritable me Grenade. Ko te US Ninth Army ano me te US XVIII Airborne Corps i raro i te whakahau mo nga whakawhiti awa o Rhine Operation Plunder me
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