the obstacle the kept the 21st division the allies on D-day
was a river called the Orne
river
Getting off the well defended beaches seems to have been the greatest obstacle. Once that happened advance was inexorable.
He was the head of the Allies military division. he was basically in control of all military actions that the Allies performed, although the Russians ignored his requests for the most part.
In the D-Day invasion the Allied armies, US, Britain, Canada and smaller numbers of many Allies were attacking German Armies holding Europe.
Russia helped the war effort on the western front in the world war 1 because in the ww1 Russia wanted to save it's allies and austria-hungary were attacking their ally that's why they entered to help their allies in the war. They attacked Germany on their front which is called the eastern front, the Russians were failing because Germans were attacking them but the Russians had many soldiers and weapon to defend their country on their front.
1. The Allies crack the German naval code 2. A German army division surrenders at Stalingrad
Getting off the well defended beaches seems to have been the greatest obstacle. Once that happened advance was inexorable.
German fortifications..................
It was slightly above a large Axis territory where the Allies had a good attacking point.
The largest and most formidable obstacle was the Atlantic Wall, a "wall" of defenses stretching the entire coast of the Atlantic.
352nd division,716th division and more
Weapons and trench warfare
The Allies were the enemies of Germany; attacking them was a prudent act of war.
The Allies gained air superiority by attacking German supply depots and airfields. By D-Day there was virtually no Luftwaffe in the air.
so they could get the Germans out of North Africa.
European countries gained military assistance and geographical diversity.
The Axis powers controlled the majority of mainland Europe. Allied forces had to attack by sea or air.
The american 1st infantry division landed at Gela, Sicily