Opening with the impact of the Civil War on telegraphic communications in Washington, this chapter discusses the lack of telegraph security at the onset of the war. Various decisions by Edwin Stanton, Western Union, and telegraph corporations led to the creation of the United States Military Telegraph (USMT) Company, which effectively privatized Union Army telegraph communications and blunted Albert Myer and the Signal Corps. The latter half of the chapter details the increasing conflicts between indigenous peoples of the Great Plains and various militias and Union Army troops, including the Sand Creek Massacre, the Julesburg battles, and the retaliatory actions against the Transcontinental Telegraph and telegraph branch lines by Great Plains warriors in 1865 and 1866.