Changes

German capabilities to launch an invasion were primitive--many small boats and transport ships with a very thin layer of naval warships. The German Army and Navy realized an invasion could succeed only if the Luftwaffe could guarantee the Royal Navy would not be able to attack the landing force. To do so, the Royal Air Force had to be defeated. The Battle of Britain decided whether an invasion was possible.

German capabilities to launch an invasion were primitive--many small boats and transport ships with a very thin layer of naval warships. The German Army and Navy realized an invasion could succeed only if the Luftwaffe could guarantee the Royal Navy would not be able to attack the landing force. To do so, the Royal Air Force had to be defeated. The Battle of Britain decided whether an invasion was possible.

===Radar===

===Radar===

Radar was the secret weapon that made possible effective RAF counterattacks on invading Luftwaffe fleets.  Radar was a defensive weapon and would not be much help top German bombers.

Radar was the secret weapon that made possible effective RAF counterattacks on invading Luftwaffe fleets.  Radar was a defensive weapon and would not be much help to German bombers.

===Battle of Britain===

===Battle of Britain===