Shutterstock Hershey, Pennsylvania Milton Hershey broke ground for his chocolate factory in Derry Church, Pennsylvania, in ...

Shutterstock Antelope Canyon Water carved this golden sandstone canyon over centuries near Page, Arizona on Navajo land. The ...

Wikimedia Commons/U.S. Navy USS Silversides The USS Silversides began service on December 15, 1941, eight days after the ...

Wikimedia Commons/Mare Island Navy Yard The 1944 Port Chicago Explosion The Navy built Port Chicago Naval Magazine in 1942 to ...

The Pearl Harbor Avenger Portsmouth Naval Shipyard got orders to build new submarines on December 15, 1941, just eight days ...

Wikimedia Commons/Warren K. Leffler, U.S. News & World Report The 1968 Poor People’s Campaign Martin Luther King Jr. planned ...

The 1942 Japanese Submarine Bombing of Mount Emily, Oregon The Japanese submarine I-25 reached southern Oregon in September ...

Shutterstock Picher, Oklahoma Picher began in 1913 after miners found lead and zinc ore on land owned by Harry Crawfish, a ...

Wikimedia Commons/National Museum of the U.S. Navy The 1942 Japanese Balloon Bomb Attack (Oregon) Japan sent over 9,000 ...

Wikimedia Commons/Ken Thomas Cataloochee Valley Cataloochee Valley was home to over 750 people by the early 1900s in what is ...

Wikimedia Commons/Kswx29 The 1999 Treece Tornado, Kansas Treece began in 1917 in the Tri-State Mining District that crossed ...

Wikimedia Commons Ancient Architects of Wisconsin’s Animal Mounds The Late Woodland people built these mounds between 750 and ...