According to Wikipedia
Lets say van Dorn dies from his wounds in another TL. How would his absence effect the course of the ACW if essentially all else remains until the war's start?. . .wounded four separate times there, including seriously when he commanded an expedition against Comanches and took two arrows (one in his left arm and another in his right side, damaging his stomach and lung) at the Battle of Wichita Village on October 1, 1858. Not expected to live, Van Dorn recovered in five weeks.