In many cases, you can refine your search using a region or group to focus your search. For example
United States--History or
Latin America--History
In many cases you can even add specific time frames such as
India--History--20th Century.
While "History" is the primary subject heading, you can narrow to specific aspects of this larger topic using some of the following terms along with the regional and time designation as noted above:
Library of Congress Call Numbers are an alphanumeric code that allow for the organization of related resources within the same shelf space.
For History, you will most commonly find materials within the letter range C to F which can be located on Level 3 of Webster Library.