Quote Originally Posted by Martinus
Battle of Britain.

-It delayed operation Barbarossa by a few weeks (6, I think), this is a few weeks closer to the Russian winter. If the Germans had launched the attack on time they could have conquered a lot more Russian territory and many every have defeated Russia, thus winning the European war.

-It gave Britain and the USA an "unsinkable aircraft carrier" with which to bomb Germany.

-It cost Germany resources.

-It proved that Germany could be defeated.

-It allowed Britain to become a base for operation Overlord.
I agree.