During the period of World War 1, the First Sergeants often carried a book in their pockets that containedadministrative files. This book, which today may be known as a "leaders book" contained the names ofeveryone in the company and their professional history (AWOLs, Work Habits, Promotions, etc.). This bookwas passed from First Sergeant to First Sergeant, staying within the company and providing the unit historicalinformation. What was this book called?
A Black Book.