On this day: July 1

Published On: Jun 28 2013 03:06:05 PM CDT   Updated On: Jul 01 2014 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 - Warsaw Pact
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Public domain

1991: The Warsaw Pact is officially dissolved at a meeting in Prague. The pact was a mutual defense treaty between eight communist states of Central and Eastern Europe in existence during the Cold War. Pictured is a badge showing the logo of the Warsaw Pact.

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