Memoir is a type of historical writing closely related to autobiography. The difference between autobiographies and memoirs is that the first tells the writer’s life story and records his experiences and achievements in the first place, while the other (memoirs) is concerned, above all, with describing and justifying events, especially those in which the memoir writer played a role or those he experienced or witnessed From near or far, and from here it falls in a middle position between (objective) history and (subjective) biography. It seems that the French surpassed other peoples in this literary art. Among the most famous of their memoirs, the Duke de Saint-Simon and Chateaubriand. The diary became so popular after World War II, a market it hadn't had before. It became the habit of military leaders, presidents of republics, and prime ministers, to devote, at the end of their lives, to writing their memoirs. The most prominent examples of this are the memoirs written by Marshal Montgomery, General de Gaulle, Presidents Churchill, Nixon, and others.