As of 2014, there were 11 National Battlefields.
The 1 National Battlefield visited by Gram and Pops is listed in black.
You can see pictures of their trip by going back and clicking
on the List of Visited Parks link above and then selecting
National Battlefields Visited by Gram and Pops.

Name
      Location
Antietam National Battlefield       Maryland
         
Big Hole National Battlefield       Montana
         
Cowpens National Battlefield       South Carolina
         
Fort Donelson National Battlefield       Tennessee, Kentucky
Fort Necessity National Battlefield       Pennsylvania
         
Monocacy National Battlefield       Maryland
Moores Creek National Battlefield       North Carolina
         
Petersburg National Battlefield       Virginia
         
Stones River National Battlefield       Tennessee
         
Tupelo National Battlefield       Mississippi
         
Wilson's Creek National Battlefield       Missouri