Dan van derDat, a British military historian, wrote in The Guardian last week that Mr. Nave made "enormous inroads" into Japanese coded messages. In June 1939, shortly before World War II broke out in Europe, the Japanese Navy began using an important new code. Captain Nave was able to read it by the end of the year.
The articles goes on to say that Churchill didn't share this with FDR. I don't believe that for a moment. Having all of our carriers out to sea at once was highly unusual and the ships we did lose were mostly antiquated battleships from a bygone era.
Churchill and FDR were both desperate to get the US into the war. And remember, Germany had a treaty with Japan for mutual assistance which meant that if Japan and America went to war, Germany would declare war on the US. That's exactly what happened on December 11th, 1941. We returned the favor the same day.
Also we know for certain that both sides, the US and the Japanese, had broken one another's diplomatic codes.
Lastly, Japan used MANY different codes throughout the war and different services used different codes. JN25b, the Naval code, was the most sophisticated but even it was 20% broken by the Brits prior to December 7th.
The articles goes on to say that Churchill didn't share this with FDR. I don't believe that for a moment. Having all of our carriers out to sea at once was highly unusual and the ships we did lose were mostly antiquated battleships from a bygone era.
Churchill and FDR were both desperate to get the US into the war. And remember, Germany had a treaty with Japan for mutual assistance which meant that if Japan and America went to war, Germany would declare war on the US. That's exactly what happened on December 11th, 1941. We returned the favor the same day.
Also we know for certain that both sides, the US and the Japanese, had broken one another's diplomatic codes.
Lastly, Japan used MANY different codes throughout the war and different services used different codes. JN25b, the Naval code, was the most sophisticated but even it was 20% broken by the Brits prior to December 7th.