Sea Lion

Type: Event

As of November 2026, Sea Lion has been mentioned in one podcast episode on The Rest Is History (Dec 2025). Codename for Nazi planned amphibious invasion of Britain (Operation Sea Lion). The episode traces planning, doubts, and eventual indefinite postponement.

Operation Sea Lion, also written as Operation Sealion, was Nazi Germany's code name for their planned invasion of the United Kingdom. It was to have taken place during the Battle of Britain, nine months after the start of the Second World War. Following the armistice with France after the Battle of France, Adolf Hitler, the German Führer and Supreme Commander of the Armed Forces, hoped the British government would accept his offer to end the state of war between the two. He considered invasion t