The message had a much deeper and darker meaning; it informed the ambassador that Japanese forces were about to attack Pearl Harbor.
First lady Melania Trump on Thursday tweeted the incorrect date of the Japanese bombing of the USA naval base in Hawaii, which was the catalyst for the involvement of the United States in World War II.
The attack's immediate impact was to jerk America out of its lingering isolationism and into full-fledged combat in World War II.
Surprised US service members who normally would have slept in on that Sunday morning or enjoyed some recreation, found themselves fighting for their lives. "11/7/1941 Thank you to all military for your courage and sacrifice!" The attack, which killed 2,402 Americans, injured another 1,282, and destroyed 188 USA aircraft and six ships, led directly to the American entry into World War II, with war being declared on Japan the following day. Trump called it "A day that will live in infamy!" but Roosevelt actually used the words "date which" (and no exclamation point, which is far more of a Trumpian flourish than a Rooseveltian one). By the time the U.S. Secretary of State received the intercepted message, the Pearl Harbor attack was well underway.
Around 2,300 American servicemen died in the attack, with just over 1,000 more injured.
The first lady, Melania Trump, also made a small mistake in a tweet commemorating the anniversary.