Following the defeat of France, Britain chose to fight on, so Germany began preparations in summer of 1940 to invade Britain (Operation Sea Lion). The first step necessary was for the Luftwaffe to secure control of the air over Britain by defeating the Royal Air Force. The war between the two air forces became known as the Battle of Britain. The Luftwaffe initially targeted RAF Fighter Command but thinking the results poor, the Luftwaffe later turned to terror bombing London. The Germans failed to defeat the Royal Air Force, and Operation Sea Lion was postponed and eventually cancelled. This beautiful Proof Silver Crown comes in a mint issued leatherette presentation case as shown.