The textbook is addressed to students beginning their second year in a Marine Corps Junior Reserve Officer Training Program. Part One (111 pages) discusses psychology, group dynamics, human relations skills, communication skills, military instruction, and problem solving as they apply to a leader. Also discussed are leadership principles, indicators of leadership, and the role of the officer. The second part, Military Orientation and Organization, describes the organization of the Marine Corps including Marine aviation, the Interior Guard, and Military Police. The military-related skills of land navigation and orienteering (a combination of cross-country running and a land navigation) are explained. Part Three contains background information related to drill and associated ceremonies. The last part presents a basic understanding of the operation of the M-14 rifle and the sidearm (.45 pistol). Study questions conclude most of the chapters and a bilbiography is included for each of the four parts. (Author/MS)