From the Document: "The American Battlefield Protection Program (ABPP) promotes the preservation of significant sites where 'historic battles were fought on American soil' [...]. Initiated by the Secretary of the Interior in 1991, the program was authorized by Congress in 1996 in the American Battlefield Protection Act (P.L. 104-333) and is currently administered by the National Park Service (NPS). For most of its existence, the ABPP comprised two distinct competitive grant programs: the Battlefield Planning Grant Program and the Battlefield Land Acquisition Grant Program. Congress authorized two new grant programs in 2019, bringing the total number of ABPP grant programs to four (see 'New ABPP Grant Programs')[hyperlink]."
CRS In Focus, IF11329
Congressional Research Service: https://crsreports.congress.gov/