A preservation survey, not a battle record. The National Park Service's 2007 study rated each battlefield's significance and how threatened it is. It gives no dates, commanders or casualties. Dates here come from the matching Wikidata battle where there is one.
Where they were fought
Each dot is a point inside the battlefield's core area, as the National Park Service maps it. Larger dots are Class A and B. Zoom in for the core areas (filled) and study areas (outlined). The filters apply to the map, the chart and the list.