Stratagems

Sextus Julius Frontinus (30-103 AD) — a Roman political figure, general, administrator, scholar, and writer. Tacitus called him a "great man," Pliny the Younger was among his friends, Martial mentioned him in his epigrams, and for military historians, he was... an unquestionable authority.
Frontinus's work is comparable in significance to the ancient treatise "The Art of War," created on the other side of the Oikumene by the great Chinese strategist and thinker Sun Tzu.
"Stratagems" is an organized collection of tactical and psychological techniques used in specific cases by ancient and modern rulers and military leaders known to the author. Moreover, these techniques were not premeditated during strategic planning but were applied due to suddenly arising adverse circumstances in order to avoid them or even turn them to their advantage. Not without reason is the second title of the book - "Military Tricks".