 The British refusal to surrender or come to terms with Germany, precipitated Adolf Hitler's order for Operation Sealion, an amphibious invasion of Britain which was to take place after Luftwaffe had secured air superiority over the English Channel.The German Air Staff, Oberkommando der Luftwaffe (OKL), was ordered by Hermann Göring, to begin attacks on targets in southern England after the publication of his 30 June directive.I.