This study reviews the life, battles, and campaigns of the Carthaginian General Hannibal while attempting to illustrate the leadership values and primary characteristics of Hannibal that contributed to his success on the battlefield. Hannibal won extraordinary victories against his opponents (primarily Romans), and usually against overwhelming odds, with a mercenary army composed of many different nations. This study demonstrates that Hannibal was one of the "Great Captains" of the past and, more importantly, that studying his life today has great relevance for modern soldiers. The leadership values of Hannibal are core values that to one extent or another can be found in all great leaders of both the past and present. This study concludes by identifying Hannibal's finest leadership values and characteristics, then demonstrating their relevancy by comparing them with current United States Army doctrine, and by showing these values through examples in the lives of nineteenth century and twentieth century U. S. military leaders. Thus the purpose of this study is to demonstrate that the lives of leaders, such as Hannibal (who lived 2,000 years ago), have relevance to military leaders today and the application of their leadership values and characteristics can produce success on the battlefield.