I love Google and Wikipedia as much as the next guy, but if you are going to write historical fiction, you better be prepared to understand the facts and details from the era in which your story is set. This means you need to seek out lots of different sources of information. Research takes in a very broad range of activities.
Here is some of what I did:
Researched genealogy through Ancestry.com and FamilySearch.org
Researched military records through Fold3.com
Talked with close and distant relatives. Including a number I’d never met before or hadn’t seen in many years.
Collected old family photos.
Studied Maude Phelps’s (gr grandmother) diaries along with photos and scrapbooks she made
Reviewed maps and other Civil War materials at the Library of Congress (online)
Toured Gettysburg National Military Park.
Visited the cemetery in Hector, NY where Hattie, Arthur, and Charlotte are buried.