Megalopolis 331 BC

[hoplite14gr]

The source more probably are (Arrian, ii. 13 ; Diod. xvi. 63, 68, xvii. 62; Aesch. c. Ctesipli. p. 77; Curt. vi. 1; Justin,xii. 1.)

We don't know what troops Corrhagus had at his disposal.
Most probably garrison troops which most likely mean peltast mercenaries.
Not a nice match up against massed spearmen.
It is a possibility that Corrhagus might have been lousy in command.

We also do not know the exact composition of Antipater's army.
But he could have raised enough pikemen to punch through.

Kind regards