I have posted a new tutorial about one way to search the holdings US Army Heritage and Education Center (USAHEC). USAHEC is the archive for the U.S. Army. This the first tutorial that shows how to use the Reference Bibliographies that are available.
Go to the Tutorials page and select the link to view USAHEC: Using the Online Catalog: Reference Bibliographies.
I will be posting more tutorials about other ways to search for USAHEC resources. When I visit to view the resources, I will post about that, too.