“Johnson’s role was known and the incident is included in either Walter Lord or Gordon Prang’s history of the battle.”
Two further examples:
In Gerhard Weinberg’s 1994 book “A World At Arms — a Global History of World War 11” (Cambridge University Press), p. 260 — there is this treason:
“The leakage by an air force officer of the American program for building up and deploying forces if the country were drawn into the war to the ‘Chicago Tribune’ in early December caused a flurry in Washington but extraordinarily little reaction in either Germany or Japan*.”
*In his footnote, Weinberg adds: “I have not been able to locate any reference to Japanese reactions to this most dramatic leak from the U.S. government in World War II.”
And then on page 339:
“Yamamoto became generally more cautious hereafter [i.e., after the defeat at Midway].
“Fortunately for the Americans, this caution did not extend to the codes used by the Japanese. Neither a careful analysis of the Midway battle itself, which could have raised suspicions about code security, nor a significant hint from the Germans, nor a ‘Chicago Tribune’ story about the use at Midway of the breaking of Japanese codes by the American navy*, registered in Tokyo.”
His footnote here reads: “The chapter on this in Lewin, “American Magic,” is entitled: “The Stab in the Back.”
The Big Leak
“So big was the leak that it might have caused us to lose World War II. So mysterious is the identity of the leaker that we can’t be sure to this day who it was…or at least not entirely sure.”
Blazoned in huge black letters across page one of the December 4, 1941, issue of the Chicago Tribune was the headline: F.D.R.’S WAR PLANS! The Times Herald, the Tribune ’s Washington, D.C., ally, carried a similarly fevered banner. In both papers Chesly Manly, the Tribune’s Washington correspondent, revealed what President Franklin D. Roosevelt had repeatedly denied: that he was planning to lead the United States into war against Germany. The source of the reporter’s information was no less than a verbatim copy of Rainbow Five, the top-secret war plan drawn up at FDR’s order by the Joint Board of the Army and Navy.
Manly’s story even contained a copy of the President’s letter ordering the preparation of the plan. The reporter informed the Tribune and Times Herald readers that Rainbow Five called for the creation of a ten-million-man army, including an expeditionary force of five million men that would invade Europe to defeat Hitler. To all appearances the story was an enormous embarrassment to a President who when he ran for a third term in 1940 had vowed that he would never send American boys to fight in a foreign war...more at the link:
https://www.americanheritage.com/big-leak