Battery M, Second U.S. Artillery

Historical marker location:

Mount Pleasant Township, Pennsylvania

( Marker is at the intersection of East Cavalry Avenue and Hanover Road (Pennsylvania Route 116), on the right when traveling north on East Cavalry Avenue.)

Marker installed: 1907

First Brigade Horse Artillery. Cavalry Corps.

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.