AR 870-5 governs the preservation, preparation, and use of the Army’s history and its historical programs.
View AR 870-5 on armypubs.army.mil
It covers historical publications, organizational history operations, lineage and honors, Army museums and artifacts, and oral history. It requires annual histories, digital preservation planning, and the collection and maintenance of historical information.
A table of contents is required for all annual histories and follows the preface or foreword. It shows major headings, sub-headings, and page numbers. (paragraph 5)
The history should be clear and concise and report all items of major historical significance to the command. (paragraph 6-1)
Annual histories are usually unclassified; however, they may include items with a security classification up to the appropriate level. (paragraph 6-1)
By authority of the SECARMY, the CMH is the sole authority for establishing and maintaining the lineages of Army organizations. (paragraph 5-1)
A CHO will consist of a command historian and based on the needs of the command, one or more additional professional historians and appropriate support personnel, such as archivists and museum personnel. (paragraph 4-3)