[Brian Bines]

One would guess that Hitlers attack on the USSR probaly did not constitute a war on two Fronts in his mind. In 1941 he had secured his position in Western Europe Britain was isolated and had no hope of mounting an invasion on its own. The RAF has not built up its Bomber force to the threat it later posed and the battle of the Atlantic was a very serious threat. I have not read Mein Kampf but according to a British historian it indicated Hitler's ambitions lay in the east, although he felt Britain and France might well attack him once he was committed to an eastward expansion. To protect his west border he had the West Wall built as a line of defence, but following his takeovers in the east prior to Sept 39 and his pact with the USSR decided to secure his position in the West once Britain and France made a stand over Poland. I believe he was credited as saying of an attack on the USSR something to the effect ' kick in the front door and the whole rotten system will collapse '. There is still a debate about whether his support for Italy over its invasion of Greece meant he did not get to Moscow before the winter of 1941 set in, which then committed Germany to a long war.
The Lufwaffe and indeed the whole of the German Armed Forces and economy simply did not have the ability to win a war that could not be won quickly as planned.
Thats my bit on a very complicated issue .