In a constantly changing world threatened by ever increasing terrorist acts, American interests, both at home and abroad, require protection provided by great military leaders. In order to produce military leaders who can successfully meet the future challenges America faces, it is important to develop and refine them early and help them understand how to create and refine a successful leadership style. The process of developing leadership styles, however, is not easy and it requires a prodigious amount of determination, time, planning, training, mentoring, and refinement. One way to help develop leaders is to show them examples of previously successful leaders, leaders such as George C. Marshall and Dwight D. "Ike" Eisenhower. Marshall and Eisenhower were two talented and exceptional leaders and are great examples of American military leadership. Their leadership styles were indispensable during World War II, and it is important for leaders today to examine why their leadership styles were so successful.