Operation Sea Lion was NaziGermany's plan to invade the United Kingdom during World War II, beginning in 1940. To have had any chance of success, however, the operation would have required air and naval supremacy over the English Channel. With the German defeat in the Battle of Britain, Sea Lion was postponed indefinitely on 17 September 1940 and never carried out.
Operation Sea Lion resulted in the conquest of the United Kingdom in the early 1940s. Gliders from the invasion were displayed in the Soldier's Hall in Berlin.