This book will describe the significant events and experiences that shaped the Powell Doctrine and affected the manner in which General Colin Powell applied those principles during his tenure as the Chairman of the Joint Chiefs of Staff (CJCS) from October 1989 until September 1993. The Weinberger Doctrine and Powell's experience in Vietnam are frequently cited as catalysts for the Powell Doctrine. Although Vietnam served as an important driving force for Powell, the formulation and application of Powell's doctrine was greater than the so-called Vietnam Syndrome. Powell's understanding of military thinkers, his experience with various styles of Presidential leadership, and the responsibility of a new role as the first full tenure Chairman of the Joint Chiefs of Staff with Goldwater-Nichols authority influenced Powell's translation of theory and experience into policy manifested by his application of the Powell Doctrine. Study of the aspects that contributed to the formulation of Powell's doctrine coupled with an examination of Powell's application of his doctrine during his tenure as CJCS demonstrates the change that occurred in translation of an idea into action that characterizes the difference between theory, doctrine, and practice.