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America Reads Japans Codes
Japanese Adm. Nomura informs his superiors that he has learned Americans were reading his message traffic. No one in Tokyo believes the code could have been broken. The code is not changed. -
Embargo Created
U.S. imposes trade sanctions, followed by an embargo, aimed at curbing Japans military aggresion in Asia -
U.S. intelligence officers continue to monitor Japanese secret messages
U.S. intelligence officers continue to monitor Japanese secret messages. In a program code-named Magic, U.S. intelligence uses a machine to decode Japan's diplomatic dispatches. Washington does not communicate all the available information to all commands -
Adm. Husband E. Kimmel assumes command of the U.S. Pacific Fleet in Hawaii.
Adm. Husband E. Kimmel assumes command of the U.S. Pacific Fleet in Hawaii. Kimmel and Lt. Gen.Walter C. Short, commanding general of the Hawaiian Department, prepare for the defense of the islands. They ask their seniors in Washington for additional men -
Adm. Yamamoto trains his forces
Throughout the summer, Adm. Yamamoto trains his forces and finalizes the planning of the attack on Pearl Harbor. -
The "bomb plot" message
The "bomb plot" message from Japanese naval intelligence to Japan's consul general in Honolulu requesting a grid of exact locations of ships in Pearl Harbor is deciphered. The information is not shared with the Hawaii's Adm. Kimmel and Gen. Short. -
Japan heads to Hawaii
The main body, aircraft carriers and escorts, begin the transit to Hawaii. -
Kimmel is informed
Kimmel and Short receive a so-called "war warning" from Washington indicating a Japanese attack, possibly on an American target in the Pacific, is likely. -
Pearl Harbor
The day that Pearl Harbor was attacked by the Japanese -
War is declared
Roosevelt delivers his "A Day of Infamy Speech" Congress also declares war on the Empire of Japan -
America Drops Bomb
America drops an atomic bomb on the Japanese city of Hiroshima -
Another Bomb is Dropped
America drops an atomic bomb on the Japanese city of Nagasaki -
Japan Surrenders
Japan formally surrenders after America dropped bombs on Hiroshima and Nagasaki. They also surrendered because America's new allies, the Soviet Union, declared war on Japan.