During the summer and autumn of 1940, Spitfires and Messerschmitts fought for mastery of the skies in a desperate conflict that became known as the Battle of Britain. Fortunately for Britain, the RAF won. In one of the ifs of history, what would have happened if the Luftwaffe had won the battle?. For the Germans, the aerial conflict was only the initial stage of a larger Battle of Britain, one whose successful outcome entailed the invasion and conquest of the United Kingdom. Through the examination of the original invasion plans, set alongside the actual conduct of relevant German operations - the airborne invasion of Crete in 1941, for example - an accurate pattern of German moves can be suggested.