What does it take to become a Marine Officer? This engaging book transports readers through the culture shock of Marine Officer Candidates School, a ten-week physical, intellectual, and emotional testing ground that every fourth candidate fails to complete. The Sergeant Instructors' intensity is palpable as candidates are made to strip away civilian habits and attitudes, replacing them the Marine Corps ethos in the hopes of becoming officers. Anecdotes and personal recollections of OCS by two generations of officers provide instructive, poignant, and humorous interludes for the reader. A second focus of the book involves research into the demographics, attitudes, and opinions of two groups of officers, separated in time by 50 years. This comparison across a wide range of personal and social issues and beliefs renders some surprising results that lie in opposition to conventional wisdom. From the older generation, the reader will better understand the lifelong impact of the Marine leadership experience. From today's officers, the reader will discover the motivations of today's allegedly soft and coddled young people to follow the difficult path to a lieutenant's gold bars. This book is required reading for anyone with an interest in the Marine Corps and its culture.