Lincoln's Generals By natalyafaith Period: Jul 5, 1841 to Sep 1, 1861 Winfield Scott Period: Sep 1, 1861 to Mar 11, 1862 George B. MClellan Period: Jul 23, 1862 to Mar 9, 1864 Henry W. Halleck Period: Mar 9, 1864 to Mar 4, 1869 Ulysses S. Grant