Operation Overlord

This point in the war was a big step for planning and leadership of the Allies.  Coordination between the different military forces (air force, army, etc.) and the different Allied countries was used more effectively in Operation Overlord.  Eisenhower, now in overall command, was making a larger effort to make this happen.  The timing chosen for these attacks was also very important because a large portion of the German forces were already occupied in the East.  Also deception was a crafty and important role because they strategically made the German forces think that they would attack Pa da Calias instead.  Doing this they included many details like operations and commanders to throw off their opponents.  These were all things that they had struggled with in the past, and so their achievement was very important for their progress.