Period-costumed actors participate in the 150th anniversary re-enactment of the surrender of General Robert E. Lee to General Ulysses S. Grant at the Museum of Confederacy in Appomattox, Virginia, April 9, 2015. (Photo by Jay Paul/Reuters)

Confederate re-enactors practice stacking their arms as part of commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate re-enactors march back to camp after a re-enactment of the Battle of Appomattox Court House as part of the commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. The battle was the final battle of the army of Confederate General Robert E. Lee before his surrender to Union troops. (Photo by Steve Helber/AP Photo)

Confederate troops fire on Union troops during a re-enactment of the Battle of Appomattox Courthouse as part of commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

A re-enactor portraying Union General Ulysses S. Grant, right, and a fellow officer arrive at the McLean house to meet with Confederate General Robert E. Lee during the commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House, Thursday, April 9, 2015, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Confederate troops march in front of the McLean House as they prepare for battle during a re-enactment of the Battle of Appomattox Courthouse as part of commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate re-enactors practice stacking their arms as part of the commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate Civil War re-enactors gather around their campfire as part of the commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate troops charge advancing Union troops as visitors watch during a re-enactment of the Battle of Appomattox Courthouse as part of commemoration of the 150th anniversary of the surrender of the army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Union cavalry wait in the woods as they prepare to charge during a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Confederate re-enactors check their weapons during a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Thomas Lee Jessee, portraying Confederate General Robert E. Lee, front, tips his hat to Union officers on the porch of the McLean house as part of the commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. Lee left the house after meeting with Union General Ulysses S. Grant after signing the surrender documents. (Photo by Steve Helber/AP Photo)

Period-costumed actor of General Robert E. Lee leaves after the surrender during the 150th anniversary re-enactment of the surrender of General Robert E. Lee to General Ulysses S. Grant at the Museum of Confederacy in Appomattox, Virginia, April 9, 2015. (Photo by Jay Paul/Reuters)

A period-costumed actor of General Robert E. Lee leaves after the surrender during the 150th anniversary re-enactment of the surrender of General Robert E. Lee to General Ulysses S. Grant at the Museum of Confederacy in Appomattox, Virginia, April 9, 2015. (Photo by Jay Paul/Reuters)

Thomas Lee Jessee, portraying Confederate General Robert E. Lee, leaves the McLean house after meeting with Union Gen. Ulysses S. Grant as part of commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate troops muster in front of the McLean House as they prepare for battle during a re-enactment of the Battle of Appomattox Courthouse as part of commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate re-enactors march back to camp after a re-enactment of the Battle of Appomattox Court House as part of the commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate troops muster in front of the McLean House as they prepare for battle during a re-enactment of the Battle of Appomattox Courthouse as part of commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Confederate officers watch the battle during a re-enactment of the Battle of Appomattox Courthouse as part of the commemoration of the 150th anniversary of the surrender of the army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

A Confederate re-enactor rides her horse back to friendly lines during a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Union re-enactors charge Confederate troops during a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Confederate officers watch the battle along with visitors during a re-enactment of the Battle of Appomattox Courthouse as part of the commemoration of the 150th anniversary of the surrender of the army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Union re-enactors charge the Confederate lines during a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Confederate troops muster in front of the McLean House as they prepare for battle during a re-enactment of the Battle of Appomattox Courthouse as part of commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)

Civil War re-enactor Steve Riggs, of Charleston S.C., with the 2nd Virginia Cavalry, lets visitors pet his horse, Jackson, before a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Confederate and Union forces clash during a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Confederate and Union forces clash during a re-enactment of the Battle of Appomattox Station, Wednesday, April 8, 2015, as part of the 150th anniversary of the surrender of the Army of Northern Virginia to Union forces at Appomattox Court House, in Appomattox, Va. (Photo by Steve Helber/AP Photo)

Confederate re-enactors take a break in their camp as part of the commemoration of the 150th anniversary of the surrender of the Army of Northern Virginia at Appomattox Court House in Appomattox, Va., Thursday, April 9, 2015. (Photo by Steve Helber/AP Photo)