nationally significant Civil War battlefields; and to create partnerships among state and local governments, regional entities, and the private sector to preserve, conserve, and enhance nationally significant Civil War battlefields. Revolutionary War and War of 1812 Study (2007) Congress authorized the Revolutionary War and War of 1812 Historic Preservation Study in 1996 because many historic sites of the American Revolutionary War and War of 1812 were at risk from rapid urban or suburban development. The goals of the study were 1) to gather current information about the significance of, current condition of, and threats to the Revolutionary War and War of 1812 sites and 2) to present preservation and interpretation alternatives for the sites. The American Battlefield Protection Program identified and documented 677 significant places associated with the Revolutionary War and War of 1812. The 2007 Report to Congress on the Historic Preservation of Revolutionary War and War of 1812 Sites in the United States presented information about at-risk Revolutionary War and War of 1812 battlefields and associated properties for consideration by Federal, State, tribal, municipal, non-profit, and private entities. Mexican American War Battlefields (2004) The National Park Service, Cultural Resources Geographical Information System Facility (CRGIS) undertook, on behalf of the American Battlefield Protection Program, a study of the significant Mexican–American War battlefields in the United States. CRGIS identified thirteen battlefields in California, New Mexico, and Texas. Each battlefield was documented, battlefield boundaries were drawn, and each site was assessed for threats, integrity, and preservation needs. CRGIS presented maps and final assessments for each battlefield to the American Battlefield Protection Program in 2004. Civil War Sites Advisory Commission Report on the Nation's Civil War Battlefields (1993) Congress established the Civil War Sites Advisory Commission in 1990 to identify significant Civil War sites, determine their condition, assess threats to their integrity, and offer alternatives for their preservation and interpretation. Because of limited time and resources, the Commission concentrated on battlefields as the central focus of the Civil War, and of many contemporary historic preservation decisions. The Commission identified 384 battlefields as the principal battles of the war and classified them according to their historic significance. The battlefields were surveyed and assessed for landscape integrity, threats, and preservation needs. A final report was presented to Congress in 1993. The Commission sunset in 1993, however, the American Battlefield Protection Program continues to implement parts of the Commission's mission and recommendations. Shenandoah Valley Study