Lieutenant Warner probably received a first-rate education in North-South politics while stationed at Fort Wise. Among the officers there at the start of the war were Maj. John Sedgwick, future commander of the Sixth Corps; William S. Walker, a Pennsylvanian who went with the Confederacy, probably because of his marriage to a Floridian; Richard Riddick, who would fall leading his 34th North Carolina at Gaines' Mill and William D. DeSaussure, who died at Gettysburg leading his 15th South Carolina; Edward Newby, of Virginia and James McIntyre, of Tennessee, both of whom would stay with the Union; and the redoubtable James Ewell Brown "J.E.B." Stuart, who would become the bane of many a Union cavalry trooper.