US Gen. George Marshall testifying before members of Joint Pearl Harbor Committee in Washington, DC

The transcript discusses the critical role of deciphering enemy codes, particularly German and Japanese, in gaining intelligence during World War II. It highlights how this intelligence was pivotal in strategic military operations, such as the Battle of the Coral Sea and the Midway advance. The document emphasizes the importance of monitoring Japanese troop movements and convoy routes, which allowed for effective military actions. It also underscores the necessity of maintaining secrecy to protect these intelligence sources, especially in light of political debates surrounding Pearl Harbor.

What was the main basis of information regarding Hitler's intentions in Europe?

How did the Battle of the Coral Sea utilize deciphered messages?

What critical information did the military obtain about Japanese deployments?

What were the consequences of disclosing vital sources of information regarding Pearl Harbor?

Why was the Roberts report on Pearl Harbor considered incomplete?