US Army Center
U.s. Army Center of Military History: Getting the Message Through: Civil War Organization and Training
An exhaustive look at the Signal Corps, the legislation behind its formation, and its many uses during the Civil War. Find the equipment used, the code for the signal flags, and pictures of the troops. This is a very detailed and...
Civil War Home
Home of the American Civil War: The Union Army in the Civil War
A brief article from "The Historical Times of the Civil War" gives a review of the Regular Army of the United States and its composition at the beginning of the Civil War.
Civil War Home
Home of the American Civil War: Military Telegraph Service
Ciphers, codes, and wiretaps were all part of the telegraph service in both the Union and Confederacy. Read about the importance of the telegraph in relaying information and obtaining plans surreptitiously. From "Photographic History of...