08/26/2011 11:15 am ET Updated Oct 24, 2011

The Civil War's Fearless Female Spies (PHOTOS)

History.com - On August 23, 1861, the infamous Confederate spy Rose Greenhow was placed under arrest in Washington, D.C. One of hundreds of women who served as spies for either side during the Civil War, Greenhow is believed to have contributed to the South’s victory at the First Battle of Bull Run (Manassas). Find out more about “Wild Rose” and three other female informants who played a significant role in America’s bloodiest conflict.

This article originally appeared on History.com.