Postal Service through the years

Published On: Feb 06 2013 08:05:34 AM PST   Updated On: May 01 2013 09:35:15 AM PDT

Patrick Donahoe, postmaster general of the struggling United States Postal Service, "has decided to retire" in February after serving 39 years at the agency, the USPS announced Friday. Check out landmark moments in U.S. Postal Service history.

Postal Dates - Pony Express
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1860: The Pony Express began as a way to deliver mail across the Great Plains and through the Rocky Mountains.

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