The US Military Academy trained officers for both sides in the American Civil War. The Commandant of Cadets played an important role in this education by overseeing the Corps of Cadets' drills and tactical instruction. Historians criticize the tactical program as antiquated because it did not consider the impact of rifled weapons, the unique American terrain, and suitability of Napoleonic tactics and strategy. Much of this blame is due to confusion between strategy and tactics and differences between minor tactics and grand tactics. The Army assigned sixteen officers as commandants between 1817 to 1864. Their impact on cadets and tactical education varied based on the amount of time as commandant and their attitude about the assignment. These commandants made changes to the program, developed new textbooks, and taught many cadets who became Civil War generals. Historians have generally ignored the roles of the commandants despite their major influence on cadets. Readers who want a better understanding of antebellum military training will appreciate discussions about preparing cadets to become officers. The biographies of the forgotten men who influenced future officers present an account of the commandant's contributions to the Academy, notable graduates, and other military service.