Athens, Missouri
August 5, 1861
This Missouri State Park is faced with the possibility of a very unpleasant new neighbor—the Athens Hog Factory. The battlefield, which played a pivotal role in keeping the "Show Me State" in the Union during the war, could see visitation fall sharply due to the smell.

Brandy Station, Virginia
June 9, 1863
Culpeper County, home of the largest cavalry battle of the war, is the 18th fastest growing county in the nation, with its population increasing nearly six percent in 2005 alone. Between 2000 and 2005, population rose 24 percent. Housing developments are beginning to encroach on the battlefield.

Defenses of Washington, D.C.
1861–1865
Over time, many of the 68 forts erected to protect Washington from Confederate attack during the Civil War have fallen into disrepair or been lost entirely. There is little attempt to interpret the rich history of those that remain.

Falling Waters, Maryland and West Virginia
July 6–16, 1863
Although both sides of the Potomac River at Falling Waters, where the Confederates made their crossing back into the South after the battle of Gettysburg, remain largely intact today, residential development is encroaching rapidly.

Fort Monroe, Virginia
1861–1865
This important Union base, the scene of the battle between the Monitor and Merrimac and a refuge for freed slaves, is slated for closure as a result of the 2005 Base Realignment and Closure report. Local preservationists are determined to save it from development.

Glendale, Virginia
June 30, 1862
Three large developments, each incorporating the name of the battlefield as a selling point, have been built within the past two years. Four other developments in the immediate area are pending, including one within musket range of preserved land.

Honey Springs, Oklahoma
July 17, 1863
Area residents recently petitioned to have the private road through this largest battlefield in Oklahoma opened to public traffic. Tourists participating in the driving tour would be forced to compete with speeding commuters, making visitation more difficult.

Hunterstown, Pennsylvania
July 2, 1863
Known by historians as "North Cavalry Field," Hunterstown was recently recognized by the NPS as part of the Gettysburg Battlefield. Unfortunately, the site is extremely vulnerable to development. Last fall, several important historic structures on the battlefield were demolished.

Kennesaw Mountain, Georgia
June 27, 1864
As the Atlanta area has grown and overwhelmed existing transportation infrastructure, roads through this National Battlefield Park have become major commuter thoroughfares. Nearly all roads through the park, including those used for driving tours, are public use roads owned by Cobb County.

Little Blue River, Missouri
October 21, 1864
This battlefield near Independence was named one of the state's most endangered sites by the Missouri Alliance for Historic Preservation in 2005. Residential and commercial development are encroaching on central portions of the field. A four-lane divided highway is also proposed through crucial combat areas.

Lovejoy's Station, Georgia
August 20, 1864
Although Henry County, Ga., purchased 204 acres of land at this key battle of the Atlanta Campaign, crucial portions of the field remain unprotected in neighboring Clayton County. Like all of the burgeoning Atlanta suburbs, the area is highly vulnerable to development.

Manassas, Virginia
July 21, 1861 & August 28–30, 1862
Continuing traffic nightmares along U.S. Route 29 make the National Military Park nearly impossible to visit during rush hour. Many preservationists fear an impending push to widen the highway to four lanes through the heart of the battlefield.

Mansfield, Louisiana
April 8, 1864
Mansfield has long been the center of an unusual preservation struggle, as an active grassroots network faces off against a lignite mining operation. Preservationists remain ever vigilant as extraction work continues. Only 177 of the more than 6,000 acres at this site are currently protected.

Newtonia, Missouri
September 30, 1862 & October 28, 1864
The long-term protection of this southwestern Missouri battlefield could be secured by its inclusion in the Wilson's Creek unit of the National Park Service. Legislation to bring it under federal jurisdiction was introduced by Congressman Roy Blunt in January 2007.

Wilderness, Virginia
May 5–7, 1864
In January 2007, the Orange County Board of Supervisors laudably voted against expanding State Route 20 through the heart of the battlefield to four lanes. Still, large areas of the battlefield along Route 20 remain extremely vulnerable to development pressures.