Did you know that the Whites Plains, NY battlefield was once part of the NPS? It is no longer, which is too bad. It was a big battle in the early part of the Revolutionary War.
According to National Parks Traveler blog:
The Revolutionary War Battle of White Plains receives scant attention, not least because the Continental Army did not win the battle and the battlefield is not a National Park System property. Although the National Park Service administered the White Plains National Battlefield Site for 23 years, no national park materialized there and the property was eventually delisted.
The National Park Service didn’t buy or acquire any battlefield land and didn’t build any facilities. No development at all occurred, unless you count the placement of three descriptive markers. In 1956, the National Park Service quietly dropped the White Plains National Battlefield Site from its list of National Park System properties.