After that was all straight, the Allies started planning the invasion. The Americans went through a few different operations before they invaded Europe. There was many things the Allies had to do to prepare for operation Overlord, so they organized them as different operations. .
The American General, Dwight D. Eisenhower was mostly in charge of the operations and plans for the battles. He knew that if they went on with the operation there was no turning back. Operation Sledgehammer was a landing at Cherbourg. It led to the developing of Operation Roundup, it was a big invasion of Pas de Calais, it was planned for 1943. Then the Americans began Operation Bolero. Operation Bolero was transporting troops and equipment to Great Britain. Operation Bolero went on for 2 years. Operation Roundup was postponed to 1944. It was changed and modified. Then it was renamed to Operation Overlord. .
The Americans were building up their forces for a long time now. The American factories were making many munitions and vehicles. The Americans made four times as many tanks as the Germans. The Americans also build twice as many munitions as the Germans. Of all the equipment the Americans made, about a fourth of it went to help and aide Great Britain.
The Americans started bringing troops to England in 1942. They also had troops in Ireland all through out the war. .
By Spring in 1944 the plans for Operation Overlord were finally complete. By the time D-Day came some of the British troops were getting very weary of the Americans. The American's lifestyles were different that the British ones. The Americans were doing just everyday things but some of the things were making the British people mad. .
In June 1944 Operation Bolero was complete. On D-Day the Allies had over 1,700,000 British troops, over 1,500,000 American troops, and 175,000 Canadian troops. There was also about 40,000 other Allied troops from other countries.
Under Adolf Hitler the German empire extended from Russia to the west, to France on the east. Germany controlled much of Europe except for Spain, Portugal, Switzerland, and Sweden (Keegan 1). Hitler's army's gained control of much of Europe during the years of 1939 through 1941. It was not until December 11th 1941 that Hitler declared war on the United States. Soon afterward, Dwight D. ...