The Germans have secured Stalingrad and have formed a solid defensive line around Moscow as planned,now the time is ripe to strike Britain. After the failure of the Battle of Britain years earlier the Luftwaffe have reformed and have taken control of the skies at last.
Now after months of planning the German army have finally organized into a force capable of an amphibious landing of Britain.
As the Allies themselves are planning on an European Invasion, the Germans have decided to use this in their favor. A pre-emptive strike on England,hoping to use the stockpiles of American munitions around coast to fuel the Axis strike force.