Cracking the Enigma machine won World War II in North Africa and Europe. The Atomic Bomb won the war in the Pacific. Smart people doing technical work helps. “Smart” people doing politics and foreign policy, not so much.
The OSS was involved in almost all aspects of the fighting, including politics and the post-war occupation.
The A bomb (put together by incredibly smart people). Ended the war in the Pacific.
Smart Admirals, incredible navy men, marines and soldiers won the Pacific. (With a good dose of luck)
“Atomic Bomb won the war in the Pacific”
That and the unrelenting destruction of Japan’s merchant fleet by the Gatos
https://www.google.com/#q=gato+class+submarine
But I’m partial to submariners :)
You left out the MAGIC intercepts. We broke the Japanese Naval and Diplomatic codes.