Union Brig. Gen. Stephen Burbridge (left)—Evans’ first brigade comman- der—and Confederate Brig. Gen. Humphrey Marshall Union Brig. Gen. Stephen Burbridge (left)—Evans’ first brigade comman- der—and Confederate Brig. Gen. Humphrey Marshall. The Kentucky natives were engaged in the commonwealth in the fall of 1862. Marshall was not at Vicksburg; Burbridge served in John McClernand’s 13th Corps. (Library of Congress; National Portrait Gallery) Library of Congress; National Portrait Gallery