1941US Ambassador Warns of Pearl Harbor Attack

Joseph Grew, the United States ambassador to Japan, cables t...
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Year
1941
1942

🚨 US Ambassador Warns of Pearl Harbor Attack

Joseph Grew, the United States ambassador to Japan, cables the State Department that Japan had plans to launch an attack against Pearl Harbor, Hawaii (his cable was ignored).
US Ambassador Warns of Pearl Harbor Attack (1941)
DiplomacyIntelligence FailurePearl HarborJapanUS-Japan RelationsWarning IgnoredPre-WarEspionage

🕵️ Takeo Yoshikawa Arrives in Hawaii

Japanese spy Takeo Yoshikawa arrives in Honolulu, Hawaii and begins to study the United States fleet at Pearl Harbor.
Takeo Yoshikawa Arrives in Hawaii (1941)
JapanEspionagePearl HarborIntelligenceHawaiiUSPacificWar Preparation

💣 Hirohito Approves Pearl Harbor Attack

Hirohito approves the attack on Pearl Harbor.
JapanPearl HarborAttackPacific TheaterImperial JapanWorld War IIUS EntryWar DeclarationMilitary Decision

📜 Hull Note Delivered to Japan

The Hull note ultimatum is delivered to Japan by the United States.
Hull Note Delivered to Japan (1941)
Hull NoteJapanUS-Japan RelationsDiplomacyPearl HarborUltimatumWorld War II

💣 Japan Attacks Pearl Harbor and Declares War

(December 8, Asian time zones) Japan launches an attack on Pearl Harbor, declares war on the United States and the United Kingdom and invades Thailand and British Malaya and launches aerial attacks against Guam, Hong Kong, the Philippines, Shanghai, Singapore and Wake Island. Canada declares war on Japan. Australia declares war on Japan.
Japan Attacks Pearl Harbor and Declares War (1941)
Pearl HarborJapanUnited StatesWar DeclarationPacific TheaterWorld War IIAttackMilitaryUnited KingdomImperialism

🔎 Operation K: Japanese Reconnaissance of Pearl Harbor

Japanese naval Operation K intended as a reconnaissance of Pearl Harbor and disruption of repair and salvage operations.
Operation K: Japanese Reconnaissance of Pearl Harbor (1942)
Pacific TheaterPearl HarborNaval OperationsReconnaissanceJapanMilitary Strategy