The Civil War was the bloodiest war America has ever faced. In many ways, it was a time of change for the United States. One of these changes was in the technologies that were developed and used. The repeating rifle, the railroad, and the submarine are technologies that were created, tested, or greatly improved during this crisis. This book explores the effect of the war, the impact each technology had on the war and on society in the years and decades following it, and the legacy of these events and developments today.