On this day: September 4

Published On: Sep 04 2012 12:29:11 AM CDT   Updated On: Sep 04 2013 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 - Robert Lee
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Library of Congress

1862: Following his victory in the Northern Virginia Campaign, Gen. Robert E. Lee moves north with 55,000 men of the Army of Northern Virginia through the Shenandoah Valley in his first invasion of the North. Lee's invasion attempt was eventually repulsed by the Army of the Potomac under Maj. Gen. George B. McClellan, who intercepted Lee's forces and attacked near Sharpsburg, Md. The resulting Battle of Antietam was the bloodiest single-day battle in American history and is widely considered one of the major turning points of the war.

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