Interior Secretary Ken Salazar says the federal government will use $4 million in offshore oil and gas development fees to preserve an additional 385 acres at Richmond National Battlefield Park.

Salazar made the announcement along with National Park Service director Jon Jarvis and Gov. Bob McDonnell at the battlefield on Wednesday. The announcement followed a town hall meeting with more than 100 Richmond tourism and business leaders to discuss way to promote visits to the battlefield and other heritage sites.

The push comes as the park service commemorates the 150th anniversary of the Civil War.

The land to be preserved lies primarily on the Glendale and Malvern Hill battlefields, both of which figured prominently in the summer 1862 campaign by Union Gen. George B. McClellan to take the Confederate capital.