Among the Most Important Classical Military Writers
(In Chronological Order from the 4th century B.C. to the 4th
century of the Christian Era):
Aeneas Tacticus (4th century B.C.)
Xenophon (Also a political theorist) (444 B.C.-357 B.C.). The Hipparchicus, a treatise on the duties of a commander of cavalry, containing military precepts.
Polybius (Also a political theorist). Unfortunately, the technical military treatises of Polybius have not survived.
Onasander (1st century A.D.)
Aelian Tacticus (2nd century A.D.)
Military Writers of the "Modern Era:"
Sun Tzu. The Art of War.
Niccolo Machiavelli (1469-1527). The Art of War.
Karl von Clausewitz (1780-1831). On War.