This database from HeinOnline offers ebooks, journal articles, special reports, government documents, and legal documents, all relating to the history and administration of the armed forces in the United States. A link to it can be found on the A-Z databases page and on the Government – Databases page. The contents of the database aren’t yet indexed by Alma or Primo, which means the only way to find and use the content is by searching directly in the database.
Here’s a video overview from HeinOnline about this new database: