Note 746 — Chapter LXXX · FROM THE DEATH OF PELOPIDAS TO THE BATTLE OF MANTINEA.
Reading edition
Here again, we know from Xenophon that the Thebans were on the left; but the general arrangement of the other contingents we obtain only from Diodorus (xv, 85).
The Tactica of Arrian, also (xi, 2) inform us that Epaminondas formed his attacking column, at Leuktra, of the Thebans—at Mantinea, of all the Bœotians.
About the practice of the Thebans, both at and after the battle of Leuktra, to make their attack with the left, see Plutarch. Quæst. Roman. p. 282 D.