If you’re not familiar with Academia.edu, it’s a site that stores and offers access to academic papers and theses pertaining to the occult and paranormal, among other subjects. This document refers to residual acoustic anomalies present at the battle site of the bloodiest war in American history: Antietam.
23,000 soldiers were killed, wounded or missing after twelve hours of savage combat on September 17, 1862. The Battle of Antietam ended the Confederate Army of Northern Virginia’s first invasion into the North and led Abraham Lincoln to issue the preliminary Emancipation Proclamation.
Read the full PDF document: GHOST_EXCAVATIONS_AT_BURNSIDE_BRIDGE