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Decoded Japanese military radio messages let U.S. forces know that the Japanese Navy was planning a very large attack on Midway Island, along with a smaller attack on Wake Island.

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What did roosevelt receive on December 6 1941?

a 14 part message from the Japanese that was then deciphered but only the first 13 parts where decoded.


Why were Japanese American forced to live in internment camps?

They were in internment camps because of the attack on Pearl Harbor. Hope that helps!!!


What did vintage helped Admiral Chester Nimitz defeat the Japanese at midway Island?

he had the element of surprise. the japanese thought that they were going to an island with little supplies and little defense but in actuality they were falling into a trap. upon their arrival they find that midway is heavily defended despite what they were told in decoded messages.


How did the united states win the battle o midway?

US Navy Special Group OP-20-G signals intelligence intercepted radio messages and decoded Japanse plans to attack and were suprised by the American Task Force


Who convinced the Japanese leaders to attack midway island?

US Naval code-breakers. The US Naval intelligence (code-breakers section) had begun to crack the super-encrypted Japanese Naval Code Kaigun Ango Sho D (known by US code-breakers as AN-1 and later called JN-25). Simplistically, this was a complex 'code within a code'. The Japanese coded-messages were transmitted by radio and then heard by US military (and Allied) listening posts throughout the Pacific. These messages were sent to a central collection office within US Naval intelligence to be decoded if possible. The more messages collected, the better the chance of finding patterns that enabled decoding of small bits of messages. Because of the US Doolittle Raid of 18 April 1942, Japanese radio traffic using the JN-25 codes dramatically increased. This assisted the US code-breakers to determine that some sort of Japanese offensive was planned for the eastern part of New Guinea & the Solomon Islands. This information was used by Admiral Nimitz to position two US aircraft carriers in the area. The US intelligence information was verified by the subsequent Battle of Coral Sea from 4-8 May 1942. This validated the earlier decoding and helped the Code breakers project that the next Japanese strike would be aimed at Midway based on the latest intercepts & partial decoding. The Japanese final decision to invade & seize Midway happened on 5 May 1942. Japanese instructions went out by radio in code thereafter. Starting 14 May 1942, the US code-breakers were getting the first hints of the Japanese Midway operation. By the next week US Admiral Nimitz was fairly certain that the Japanese would attack Midway the first week in June.

Related Questions

Name of the Machine that decoded Japanese messages in world war 2?

People not machines


What are the decoded messages on spy island?

You don't need them. Why you don't I don't know.


The code talkers knew their code was a good one because?

Their messages were not decoded by the enemy.


How did American Chester Nimitz learn of the Japanese plans at the Battle of Midway?

The US Naval Communications Service OP-20-02 Station "HYPO" signals intelligence unit in Honolulu, Hawaii intercepted and decoded Japanese JN-25 radio messages of their pending military plans.


What are the decoded messages in chasing vermeer?

In "Chasing Vermeer" by Blue Balliett, the decoded messages include clues related to the famous painting "A Lady Writing" by Johannes Vermeer. The messages help the characters Petra and Calder solve the art mystery and uncover the truth behind the theft of the painting. Through decoding ciphers and unraveling hidden messages, the two friends decipher the clues to piece together the mystery.


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

The US Navy Communications Group OP-20-02 Station "HYPO" Communications Intelligence Unit at Pearl Harbor, Hawaii intercepted and decoded radio messages of the Japanese military plans and the US Navy sent Task Force 16 and 17 to ambushed them.


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

The US Navy Communications Group OP-20-02 Station "HYPO" Communications Intelligence Unit at Pearl Harbor, Hawaii intercepted and decoded radio messages of the Japanese military plans and the US Navy sent Task Force 16 and 17 to ambushed them.


How did Admiral Chester Nimitz learn of the Japanese plans at the Battle of Midway?

The US Navy Communications Group OP-20-02 Station "HYPO" Communications Intelligence Unit at Pearl Harbor, Hawaii intercepted and decoded radio messages of the Japanese military plans and the US Navy sent Task Force 16 and 17 to ambushed them.


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

The US Navy Communications Group OP-20-02 Station "HYPO" Communications Intelligence Unit at Pearl Harbor, Hawaii intercepted and decoded radio messages of the Japanese military plans and the US Navy sent Task Force 16 and 17 to ambushed them.


How did the admiral chester nimitz learn of the Japanese plans at the battle of midway?

The US Navy Communications Group OP-20-02 Station "HYPO" Communications Intelligence Unit at Pearl Harbor, Hawaii intercepted and decoded radio messages of the Japanese military plans and the US Navy sent Task Force 16 and 17 to ambushed them.


How did admiral chester nimitz learn of the Japanese plans at the battle of midways?

The US Navy Communications Group OP-20-02 Station "HYPO" Communications Intelligence Unit at Pearl Harbor, Hawaii intercepted and decoded radio messages of the Japanese military plans and the US Navy sent Task Force 16 and 17 to ambushed them.


What happened at the Battle of Midway?

USN decisive victory.The Americans decoded a radio message of the Japanese plans and ambushed them