The Battle of Britain in 1940 became a big air conflict in which the Royal Air Force defended against relentless

https://wiki-quicky.win/index.php/The_Role_of_the_Kriegsmarine_in_World_War_II:_A_Naval_Perspective

The Battle of Britain in 1940 changed into a outstanding air struggle in which the Royal Air Force defended opposed to relentless Luftwaffe attacks on British cities.