This bill makes changes to how the federal government supports the preservation and interpretation of American battlefields. Specifically, it modifies the American Battlefield Protection Program, which provides grants to help states, local communities, and organizations protect historic battlefield sites. The main changes involve making it easier for organizations to receive federal funding by reducing the amount of money they have to contribute themselves—lowering the required local cost-sharing from 50% to 25% for two types of grants (interpretation and restoration grants). The bill also extends the authorization for these grant programs from 2028 to 2036, ensuring they'll continue operating for another decade. Additionally, the bill directs the National Park Service to conduct comprehensive studies of French and Indian War sites (1754-1763) and Mexican-American War sites (1846-1848) across the country. These studies will identify historically significant sites, assess what threats they face, and recommend ways to preserve them—potentially including adding some to the National Park System. The Secretary of the Interior must complete these studies within two years and report back to Congress with findings and recommendations.