"Hellenica" is a historical work written by the ancient Greek writer Xenophon. In this book, the author tells about the events that took place in Greece between 411 and 362 BC. He describes the Peloponnesian War, the inner life of the Greek polis, political conflicts and contradictions. Xenophon skilfully reveals the complex interrelationships between the polis, talks about diplomatic efforts, battles and intrigues. "Hellenica" is not only a history of wars and conflicts, but also an attempt to analyze the causes and consequences of the events that took place in Greece in the V-IV centuries BC. This book helps the reader to better understand the complex political and social situation in ancient Greece and to enrich his knowledge of ancient history.