During the Battle of Britain the main German fighter was the modern Messerschmitt bf109/E. Many of the best Luftwaffe pilots had seen action in the Spanish Civil War using an earlier version of the bf109. They used this invaluable experience to develop tactics to suit the new high-speed aircraft.
The bf109 was designed by Willy Messerschmitt in response to a specification for a new fighter issued in 1934. It utilised advanced design features for the day having a stressed monocoque body similar to a modern car, a fuel injected V12 engine, an enclosed cockpit and retractable undercarriage.