By Shriya Trilok, Staff Writer   This article originally appeared on pages 25 to 26 of the Sept. 2026 edition of The Gettysburgian magazine Gettysburg College has hired four new tenure track professors who have begun teaching the fall 2026 semester.   Aaron Astor was hired with tenure as the Robert C. Fluhrer Professor of Civil War Studies, a position previously held by the late Professor Peter Carmichael. Before coming to Gettysburg, Astor served as a professor of history at Maryville College. He earned a Ph.D. in history from Northwestern University in 2006 and a B.A. from Hamilton College in...