The Scottsdale Civil War Roundtable will host historian Cory Pfarr 6 p.m. Tuesday, Dec. 12, in the Copper Auditorium located on the lower level of the Civic Center branch of the Scottsdale Public Library, 3839 N. Drinkwater Blvd.

Pfarr’s lecture, “My Own Movement and On My Own Responsibility: The Saga of Lafayette McLaws’ Commentary on Longstreet at Gettysburg,” will examine the role of Gen. James Longstreet and his generalship at Gettysburg.

Pfarr is the author of “Longstreet at Gettysburg: A Critical Reassessment” and “Righting the Longstreet Record: Six Matters of Controversy and Confusion.” He has also written articles for many Civil War periodicals and has appeared on C-Span American History TV.

Doors open at 5:15 p.m. to meet the speaker, browse the book sale and view Civil War videos. Parking is free at the adjacent covered parking garage.

The public is welcome to attend the monthly meeting of the Scottsdale Civil War Roundtable. To view its current speaker schedule visit scottsdalecwrt.org.