This collection consists of office files (1941-1946) for the Helena district office of the United States War Production Board (WPB). There are three subgroups: general office files, mining division files, and salvage division files. General office files consist primarily of the correspondence of district manager Oscar A. Baarson with other WPB offices, and with companies and individuals around the state. In addition the subgroup includes a subject file, minutes of various related organizations, and miscellany. The Mining Division subgroup includes correspondence of Technical Advisor for Mining William M. Manning with other WPB Mining division administrators, a subject file on mining operators and strategic minerals, and a card file on mines. After Manning's death April 1, 1945, Oscar Baarson became the Acting Technical Advisor for Mining. The Salvage Division subgroup includes correspondence of E.J. Keeley and the Montana State Salvage Committee with other WPB salvage operations, and with private companies; correspondence of the Women's Division; and press releases, reports, and general subject files.