Book excerpt: This book will make a first contribution to identify the gaps in current practices and provide alternative mechanisms to conceptualize professionalism that is reflective of changing requirements, culture, and demographics of the contemporary military force.The military profession promotes the development, sustainment, and embodiment of ethos, which guides conduct across operational contexts, from times of national and international crises and security challenges (e.g., war, natural disasters, and peace support operations). It is imperative for military leaders to understand how ethos and doctrine shape professional frameworks, which guide the conduct of military members.