Operation Sealion a success!

[??????????]

Lets speculate that Operation Sealion was a tremendous success. British forces are being pushed back towards London from the south of England. Does the US step in to assist our close friend and ally? Does the US wait and build up forces in another location? What are the possible launching points for a US/allied resistance re-conquest of the U.K./Europe? Would Ireland waive its' neutrality and allow the US a place to stage its' military? Or would Spain be an alternative starting point? Say the British Army is hopelessly scattered. Could the Canadians and US Armies alone defeat the Germans or at least beat them back enough to re-organize the British Army?

[True Federalist (진정한 연방 주의자)]

For Sealion to have any chance of success, Operation Adler would have had to have remained focused on attacking the RAF not been diverted into a campaign to bomb London.  Also, acquiring the use of some of the French fleet would have been quite helpful, if only to divert the Royal Navy by having it remain as a fleet in being in the Mediterranean.

That said, I can't see Sealion causing a German victory unless it panics Britain into a surrender.

However, the probable use of poison gas to repel the invasion would have revealed that Britain did not have nerve agents, which would mean that Barbarossa would seen the Germans using them and with them, taking Moscow and Leningrad  in 1941.  With Russia f'ed over, Japan can go after the Northern Resource Area instead of the Southern Resource Area and thus has no need for Pearl Harbor.