On the 70th anniversary of Pearl Harbour, the attack that propelled America into the Second World War, a declassified memo shows that Japanese surprise attack was expected.
Now, on the 70th anniversary of Japan's devastating bombardment of the US Pacific Fleet at Pearl Harbour, Hawaii, evidence has emerged showing that President Franklin D.Roosevelt was warned three days before the attack that the Japanese empire was eyeing up Hawaii with a view to "open conflict."
Dated December 4, 1941, marked as confidential, and entitled "Japanese intelligence and propaganda in the United States," it flagged up Japan's surveillance of Hawaii under a section headlined "Methods of Operation and Points of Attack."