On this day: September 4

Published On: Sep 04 2012 12:29:11 AM CDT   Updated On: Sep 04 2014 01:00:00 AM CDT

Los Angeles is founded, Arkansas' governor calls out the National Guard to prevent the integration of a Little Rock school, swimmer Mark Spitz sets a new Olympic gold medal mark, and Google is founded, all on this day.

OTD September 4 - USS Greer
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U.S. Navy

1941: A German submarine makes the first attack against an American ship, the USS Greer, three months before the United States officially entered World War II. The incident led President Franklin D. Roosevelt to issue what became known as his "shoot-on-sight" order.

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