How did admiral chest Nimitz learn of the Japanese plans at the battle of midway?

Admiral Chester W. Nimitz learned of the Japanese plans for the Battle of Midway primarily through successful intelligence efforts, particularly the breaking of Japanese naval codes. U.S. cryptographers had managed to decipher key messages from the Japanese, revealing their intentions to attack Midway Island. This critical intelligence allowed Nimitz to prepare an effective counter-strategy, positioning U.S. forces to exploit the element of surprise and ultimately achieve a decisive victory.