In September 2012, the Department of the Army published new capstone doctrine, ADP 1, The Army, in which the concept of military professionalism occupies an especially prominent place. Coinciding with the release of The Army, the Chief of Staff declared that 2013 features a focus on professionalism, titled "America's Army-Our Profession," in an effort to better understand the idea of military professionalism. Military history can and should contribute to an understanding of American military professionalism. Investigating the nature of professionalism in the officer corps serving during President George Washington's administration, the central argument of this study is that early Army leaders demonstrated a particularly American style of military professionalism. The early officer corps grappled with the same elements described by the Army's current doctrine as fundamentally characteristic of military professionalism: trust, expertise, service, esprit and stewardship. Understanding the strengths, weaknesses, challenges, and limitations of the early officer corps' approach to professionalism in light of these five key characteristics provides important background and a useful conceptual framework to more fully understand the American military tradition and today's doctrine concerning military professionalism.