This study of the “Battle of the Rosebud” shows parallels between the army of 1876 and our army today. It briefly investigates the linkage of National Policy, political objectives, National Military Strategy, and the operational level of war. The army of 1876, like the army of today, experienced drastic downsizing. It had problems adjusting doctrine to the type of fight they were experiencing, not unlike our experience in Vietnam. The study of the battle provides some lessons we have had to relearn in the recent past. It is a study of how a relatively small, unsophisticated culture fought and won against an adversary that was vastly superior in population, organization, technology and resources. As a secondary benefit, the study of this battle offers a look at the advantages, disadvantages and compromises that must be considered in combined warfare. For these reasons, this study holds powerful lessons for soldiers serving in our armed forces today. The struggles with doctrine, training the force, force structure, combined warfare, and leadership challenges are just some of the parallels that can be drawn between Crook’s Big Horn and Yellowstone Expedition and our modern units.