re: #272 Render
Operation Sea Lion had a couple of requirements before it could proceed.
(1) The defeat of the Royal Navy and (2) the RAF. The RAF (the Few, the Proud) won the Battle of Britain, and the Royal Navy, though battered, bloody, and stretched around the planet, remained in position to menace the Channel.
No sweat on your #260 strike through, understandable.
While control of the sea is essential for an island nation such as Britain, Hitler could only be toppled via a land invasion. Even the strategic bombing of Germany had less then satisfactory results. The war could not be won on the cheap. Paris was liberated by armored forces, not by the navy.