“Similarly, Ultra’s role in the Battle of Britain was limited: better grade intelligence came from prisoners, captured documents and improved air reconnaissance.” p I didn’t think that Enigma had much of a role in BoB or later air campaign.
Frankly, I would agree with you on the B of B. I don’t remember any significant use of Ultra until prior to the Second El Alamein. It was definitely a crucial factor in the British Navy’s success against the Italian resupply of Rommel in Africa. Of course by then, Hitler had pulled much of Rommel’s strength by depleting his air strength and shifting other supply factors towards the Eastern Front. Then along came Operation Torch and the USA was now in the game. I’d say the Mediterranean remained the key area of usefulness for the Allies of having broken the Enigma.....thanks to the Poles and French....the War’s best kept secret.....and perhaps the Atlantic campaign as well.
i don’t remember much of a roll at all for Enigma before