Putting Enigma back into the Allied war effort

Did Enigma intelligence win the Second World War on its own?

No. It was a major information source and a key factor in Allied victory within a wider technological and intelligence contest.

The disclosure of Enigma intelligence brought a period in which accounts of the Second World War gave it overwhelming weight. Later reassessment put that contribution into the wider context of Allied victory. Enigma was a valuable information source and a major factor in the outcome. It belonged to the war's technological and intelligence contest, while other factors also helped determine who won. Giving it that context changes the explanation of victory without dismissing its importance.