Kammala jumla mai zuwa: Operation Tonga ya samo asali ne daga shirin Operation Overlord, shirin da za a yi na mamaye Faransa da kuma bude wani
Na biyu a Arewa maso Yammacin Turai. Shirye-shiryen mamayewar Turai da Allies suka fara a watan Mayu 1943 lokacin da Shugaban Amurka Franklin Delano Roosevelt da Churchill suka hadu a Taron Washington. Shugabannin biyu na Allied sun yanke shawarar cewa dukkanin sojojin Allied a cikin wasan kwaikwayo ya kamata a mayar da hankali a Birtaniya, kuma ya kamata a fara shirin mamaye Arewa maso Yammacin Turai. An saita kwanan wata na wucin gadi na Mayu 1944, sunan mai suna Overlord ya yanke shawarar, kuma an kirkiro ma'aikatan shirin Anglo-American a karkashin Lieutenant-General Frederick E. Morgan, wanda aka ba shi mukamin Shugaban Ma'aikata ga Babban Kwamandan Sojan Sama (COSSAC). Shirin da aka amince da shi a ƙarshe ya bukaci Birtaniya ta 6th Airborne Division da Amurka 82nd da 101st Airborne Divisions su sauka a kowane bangare na wuraren saukowa don tabbatar da bangarorinsu da kuma kare dakarun da ke saukowa daga hare-haren. Sojoji na Birtaniya sun sauka a gabas kuma sojojin Amurka sun sauka a yammacin Bayeux don tallafawa sojojin soja da makamai masu linzami da ke ci gaba daga bakin teku. An fara aikin ne a daren ranar 5 ga Yuni, tare da turawa na 6th Airborne Division zuwa gabashin Normandy. An ba shi aikin kare gabashin gefen gabar tekun Allied, tabbatar da mahimman yankuna masu muhimmanci a gabashin Caen, kama manyan gadoji da yawa a kan Canal Caen da River Dives, da kuma lalata batirin bindigogi na bakin teku.