Overview of Civil War Codes and Ciphers

Civil War at the National Cryptologic Museum on Virmuze

Famous codes & ciphers through history & their role in modern encryption

Civil War Reconstruction PUZZLE STATIONS: Civil War, Lincoln, Andrew Johnson

American Civil War Cipher Reel Photograph by Library Of Congress - Fine Art America

Civil War Cipher Disks

Woods, Ciphers, and Stones

Confederate Cipher Disc

History of Codes and Ciphers in the United States Prior to World War One (Cryptographic Series): United States Army Security Agency Historical Section, Barker, Wayne G.: 9780894120268: : Books

War D[epartment] Ciphers Sent Jany 27th 1864 to Dec 2[nd?] - Thomas T. Eckert Papers - Huntington Digital Library

Confederate Code Disc

Codes, Ciphers and Secret Writing (bundle)

The Signal Corps - Antietam National Battlefield (U.S. National Park Service)

Cryptology - Ancient, Codes, Ciphers