1st Corps Headquarters

Historical marker location:

Cumberland Township, Pennsylvania

( Memorial is on Reynolds Avenue, on the right when traveling north.)

Marker installed: 1913

Army of the Potomac. Major General Abner Doubleday.

Pennsylvania was the site of the deadliest nuclear accident in U.S. history. In 1979, a partial meltdown occurred at the Three Mile Island nuclear power plant in Harrisburg, Pennsylvania.