Chancellorsville and Gettysburg Author:Abner Doubleday Chancellorsville and Gettysburg is a reprint of the 1886 edition by Charles Scribner's Sons. Abner Doubleday was present at both battles and commanded the First Corps at Gettysburg. The First Corps,containing the Iron Brigade, that was first on the scene the first day at Gettysburg. Doubleday's writing contains the little details that someone... more » on the scene would know.« less