Aeliānus in Harpers Dictionary of Classical Antiquities

The Tactician, a Greek writer on war, about 100 A.D., composed a work dedicated to Trajan on the Greek order of battle, with special reference to Macedonian tactics (Τακτικὴ Θεωρία), which is extant both in its original and in an enlarged form. The original used falsely to be attributed to Arrian. See Köchly, De Libris Tacticis (1852).