This Civil War officer, who had no formal military education, is widely regarded today as a natural military genius on the use of mobile warfare.

In 1912, Congress created the Children’s Bureau. This lady was its first director.

Known as the Black Edison, this man’s inventions modernized the railroads and helped control the flow of electricity.

This city was the capital of the Holy Roman Empire from 800 to 814.

This Civil War battle was the largest all-cavalry fight of the war.

This military theorist said, "He who seeks to deceive will always find someone who will allow himself to be deceived."

This philanthropist and business giant pioneered many employee benefits including wage dividend, retirement annuity, life insurance, and disability benefits.