"The Fifteen Decisive Battles of the World: from Marathon to Waterloo" by Sir Edward Shepherd Creasy This book tells the story of the fifteen military engagements which, according to the author, had a significant impact on world history. Each chapter of the book describes a different battle, thus fifteen battles are discussed and fifteen chapters are included. Since the publication of Creasy's book, other historians have attempted to modify or add to the list, however the original is still the most highly regarded.