The U.S. Navy supplied the British with information and techniques to help them break Japanese codes.
It is suspected that Churchill knew about the attack on Pearl Harbor and did not tell Roosevelt because he very much wanted it to succeed, to bring the U.S. into the war.
The main evidence here is that every single scrap of information or documentation on interception of Japanese messages has been carefully destroyed, up to the day Pearl Harbor was attacked.
I suspect Churchill was also involved in the slaughter of Americans in the sinking of the Lusitania - deliberately packed with Americans and ordered to turn in front of the position of a known UBoat.
It is suspected that Churchill knew about the attack on Pearl Harbor and did not tell Roosevelt because he very much wanted it to succeed, to bring the U.S. into the war.
The main evidence here is that every single scrap of information or documentation on interception of Japanese messages has been carefully destroyed, up to the day Pearl Harbor was attacked.
I suspect Churchill was also involved in the slaughter of Americans in the sinking of the Lusitania - deliberately packed with Americans and ordered to turn in front of the position of a known UBoat.