Civil War "spy chiefs" -- Intelligence courier systems -- Secret organizations: Northern sympathizers in the South ; Southern sympathizers in the north -- Technology assist in Civil War spying -- ...

Many Confederate spies were women. One of the most famous was Rose Greenhow, a wealthy widow and socialite who lived across from the White House. She organized a spy ring that relayed information via ...

The former slave known for leading more than 300 people—including her elderly parents—to freedom as a conductor on the Underground Railroad was also a Union spy. Born in Maryland around 1820, Tubman ...

See photo of Federal Hill home at 337 E. Hamburg Street in Baltimore, which is listed on the National Register of Historic Places.

One of the most effective Union spies was Elizabeth Van Lew. Over a course of four years she quietly sent valuable intelligence to Union officers and even ran her own network of spies. The Granger ...

WILMINGTON, N.C. -- One of the most important African American leaders of the late 1800s was born in North Carolina, but his accomplishments and influence vanished from history for 100 years. Abraham ...

There were spies at nearly every corner during the two world wars. The most famous in World War I was Mata Hari (real name Margaretha Geertruida Zelle), a German spy operating among the Dutch people, ...