Answer:
To gain land back in France and to push back Nazi forces
Step-by-step explanation:
d-day or by its official name 'Operation Overlord' was a planed with the United Kingdom, Canada and America to bring troops over to England to depart from ports along the Hampshire and Dorset coasts on June 6th 1944 to head for Normandy to attack Nazis and drive the German military back and out of Normandy and to temporarily stop Nazi invasion until they could gain more supplies and troops. As well as to stop a potential invasion of England as Nazis had already began a German air force (Luftwaffe is its official name) attack threw out from July through September 1940, after the fall of France.