クセノポン (Xenophon) was an ancient Greek historian, philosopher, and soldier, born around 430 BC. He is best known for his writings on the history of Greece, particularly his work titled Anabasis, which recounts his experiences as a mercenary in the Persian Empire. Xenophon was a student of Socrates and contributed significantly to the understanding of Socratic philosophy through his dialogues. In addition to history, Xenophon wrote about various subjects, including politics and economics. His works, such as Cyropaedia, provide insights into leadership and governance. Xenophon's writings have influenced both historical scholarship and philosophical thought throughout the centuries.