1941 ⟶ Takeo Yoshikawa Arrives in Hawaii
Japanese spy Takeo Yoshikawa arrives in Honolulu, Hawaii and...Year
1941
🕵️ Takeo Yoshikawa Arrives in Hawaii
Japanese spy Takeo Yoshikawa arrives in Honolulu, Hawaii and begins to study the United States fleet at Pearl Harbor.⟶

JapanEspionagePearl HarborIntelligenceHawaiiUSPacificWar Preparation
💰 US Freezes Japanese Assets in Response to Indochina Occupation
In response to the Japanese occupation of French Indochina, US President Franklin D. Roosevelt orders the seizure of all Japanese assets in the United States.⟶

USJapanSanctionsIndochinaEconomic WarfarePearl HarborRoosevelt
🚨 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).⟶

DiplomacyIntelligence FailurePearl HarborJapanUS-Japan RelationsWarning IgnoredPre-WarEspionage
🛳️ Japanese Fleet Sails for Hawaii
A Japanese attack fleet of 33 warships and auxiliary craft, including six aircraft carriers, sails from northern Japan for the Hawaiian Islands.⟶
Pearl HarborJapanNaval StrategyPacific TheaterAttack PreparationWorld War IIUS