The sesquicentennial of the Civil War has created an interest in noting other anniversaries beyond the battles. One of these is a commemoration of a transition that took place at Arlington House, the former home of Robert E. Lee in Virginia, when the use of the estate by the Union army changed from a temporary occupation to a permanent headquarters, camp grounds and military cemetery.

The National Park Service will present a program, “The Seizure of Arlington and the Homeless Lees” to commemorate that time period in 1861with a free, nighttime program at Arlington House on Oct.29. Included in the events is a talk by author and historian Anthony Gaughan whose book, “The Last Battle of the Civil War” is about the confiscation of the estate and the legal battle to reclaim it by the Lee family following the war. He will speak at 7:15 p.m. and again at 8:15 p.m.

Other activities planned that evening between 6 and 9 p.m. are period music, guided walking tours, military drill demonstrations and activities for children.

Reservations, which are required, may be made by calling 703-235-1530.