The current world order is such that unilateral military action on the part of the United States is highly unlikely. Consequently, when employed, American forces are required to function as part of an alliance or coalition. Such multinational operations present unique challenges, so it is vitalthe correct lessons be learned from each opportunity. Formal procedures have been established to capture "lessons learned" from recent combined operations. However, short shrift is often given to more historical experiences. Is it possible to learn something relevant to present-day or future operations from "dated" events, such as the American Revolution?By examining French-American operations of the Revolution through the lens of present day principles of war, military operations other than war, and multinational operations, it is evident these historical operations offer information relevant today. Failed French-American operations were found lacking in tenets such as unity of effort, unity of command, and mutual confidence. Conversely, these same principles were successfully applied in the victory at Yorktown. Military leaders must understand that history can provide potential answers to questions regarding present-day and future multinational operations. Also, it is important to understand that the level of trust, comfort, and respect required to conduct military operations with our allies cannot be quickly attained.