""Why Preparedness: The Observations Of An American Army Officer In Europe, 1914-1915"" is a book written by Henry Joseph Reilly in 1916. The book is a firsthand account of Reilly's experiences as an American Army officer in Europe during the early years of World War I. Reilly provides detailed observations of the war and the military strategies employed by the European powers. He also discusses the importance of preparedness and the need for the...