General James Harrison Wilson, said of his subject, "John A. Rawlins, all things considered, was the most remarkable man I met during the Civil War..." That is a remarkable statement from one who served under McClellan and Grant, and was a respected cavalry leader in his own right. Many consider that without Rawlins, Grant would not have climbed to the heights he achieved in the war. John Rawlins wrote, "You know, I believe more in the infallibility of numbers than in the infallibility of generals, no matter how great their reputation." Yet he was devoted to Ulysses S. Grant during the Civil War and to the end of Rawlins' short life. Grant felt he could not do without Rawlins and would not give him a front-line command. This interesting young man was a key background figure in the American Civil War. He was promoted general and later was Secretary of War under Grant.