The book "History of Rome. Book III. From the unification of Italy to the conquest of Carthage and the Greek states" was written by the outstanding German historian Theodor Mommsen. In this part of his work, the author depicts a complex period in the history of the Roman Republic, beginning with the unification of Italy and ending with the conquest of Carthage and the Greek city-states. Momsen explores the political, social and military events of the time in detail, revealing the important moments and key figures of the period. Thanks to the in-depth analysis and concise description of events, the book provides the reader with an opportunity to deeply understand the important stages of the development of the Roman state and its relations with other forces of that time. This work is undoubtedly an important source of knowledge for those interested in the history of Rome and the ancient world in general.