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The event the president was referring to was Pearl Harbor. Hoped that helped!
The event that Roosevelt is referencing is the pearl harbor, this was a Japanese attack on US soil. Below you can learn more on the pearl harbor attack.
What was the pearl Harbor event?
This was the bombing of the pearl harbor by the members of the Japanese army during the second world war.
The event was what led the United States to become a full participant on the second world war.
Read more on the pearl harbor here: https://brainly.com/question/860420