Polyaenus was a Greek author known for his work on military strategy during the 2nd century AD. He is best known for his book, "Stratagems," which compiles various historical examples of clever tactics used in warfare. This work serves as a valuable resource for understanding ancient military practices and strategies. His writings focus on the ingenuity of commanders and the effectiveness of unconventional tactics. Polyaenus draws from various historical sources, providing insights into battles and sieges, making his work significant for both historians and military enthusiasts interested in the art of war.