This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
528637Full Citation: Gen. George A. Custer; ca. 1860 - ca. 1865; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://docsteach.org/documents/document/1-gen-george-a-custer, May 2, 2024]