The purpose of this study is to identify and analyze the leadership competencies of Major General Winfield Scott Hancock, the most consistently successful corps-level commander of the Civil War. Over the course of his 44 years in uniform, General Hancock participated in the Mexican War, Civil War, and Indian Wars. He was the candidate of the Democratic Party in the 1880 Presidential election. Nicknamed "Hancock the Superb", he was recognized as the best combat commander in the Army of the Potomac. Remaining a general in the Regular Army after the Civil War, Hancock played a major role in post-war affairs. In order to gain insight into Hancock's leadership competencies, DA Pamphlet 600-80 and Field Manual 22-103 will be used as a framework. Research will chronologically follow aspects of Hancock's life and career to identify skills as they are developed and employed.