On this day: July 1

Published On: Jun 28 2013 03:06:05 PM CDT   Updated On: Jul 01 2016 01:00:00 AM CDT

The Battle of Gettysburg begins, America's first zoo opens, the first Tour de France starts, the Sony Walkman hits the market, the PG-13 movie rating is introduced, and the Deepwater Horizon oil spill breaks an unfortunate record, all on this day.

OTD July 1 - Battle of Gettysburg
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Library of Congress

1863: The Battle of Gettysburg begins in Pennsylvania during the American Civil War. Over the three-day battle, Union forces led by Maj. Gen. George Meade defeated attacks by Confederate Gen. Robert E. Lee's Army of Northern Virginia, putting a stop to Lee's invasion of the North. The battle, which saw the largest number of casualties during the Civil War, is often described as the war's turning point.

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