Just one thing to add to the answers above.
You say Hitler attacking the Western powers was clear cut but remember, had Hitler got his way, he would never have needed to attack in the west. As picked up above, Hitler wanted Lebensraum in the East. In his pathetic mind, he thought that Britain and France would allow him to do that in return for leaving them and their empires alone. Because, after Hitler tore through the Munich agreement, the Western Allies decided enough was enough, Hitler had to extinguish the threat in the west first. Attacking in the west was a means to an end; i.e. Lebensraum, not the end in itself.
22nd November 1944 - The British Pacific Fleet is born (temporary avatar changes to commemorate the ships and aircraft). HM Ships Formidable, Illustrious, Victorious