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Chronology Help
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The following list of help topics will link you to the appropriate section. To return to the list, click the back button on your navigation toolbar or scroll to the top of the page.



Browsing the Chronology

Browsing the Chronology is done by using the graphic timeline.

The timeline is divided into 10-year segments. Clicking on the desired decade displays all events for the decade in chronological order. Events that are associated with an entire year are shown first; events with specific dates in that year follow. In both browse and search mode, 15 or fewer events are displayed on the screen at once. If there are more than 15 events related to your query, a link for "Next Events" or "Previous Events" will be shown accordingly.

Once you are in the browsing mode, specific years of each decade can be viewed separately by clicking on the year link as it appears beneath the graphic timeline.


Searching Overview

Keyword searching is case insensitive ("steel" matches both "steel" and "Steel"). In the search results, your search term appears in red text.

Any time a date-related search is performed, you have the option of selecting year, month, or day, or any combination of the three. Note: date searching can be performed without a keyword search. For example, you could find all events that occurred on September 21st, regardless of year.

When viewing the results of a search, clicking on the year of each event will display all the events in that given year.

Searches are automatically wildcarded before and after your search term. This sometimes produces results that contain the letters of your term within different words.  For example: a search on "war" produces results including "Edward". To get an exact match for your search term, put a space before and after your term.

For an internal wildcard, use the percent sign (%). For example "wom%n" searches for "woman" and "women".


Simple Search

Simple search looks for a single term or phrase with any combination of year, month, and day (default searches all dates).


Advanced Search

Advanced search permits keyword searches with multiple terms and Boolean operators, and allows date searches on either a single date or a date range (default searches all dates).

A Boolean search uses the following operators:

  • AND retrieves events that contain both search terms.
  • OR retrieves events that contain either of the search terms.
  • NOT retrieves events that contain the first search term, but do not contain the second (or third) search term.

Note: The first two search term boxes are always grouped together--the parenthesis around the first two search boxes represents this grouping. Therefore the search "war AND steel OR night" is executed as "(war AND steel) OR night".

Another example:

  • "(steel OR night) AND war" lists events that have STEEL and WAR, as well as events that have NIGHT and WAR.

Single Date Searching:

The default advanced search uses a single date search with values of "all" for year, month, and day. As with the simple search, you can specify a specific year, month, day, or any combination of the three.

Range Date Searching:

Select "Search within a range of dates" to perform a search with a specific start and end date.  The default date range is from January 1st 1717 to December 31st of the final year in the chronology.


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