τάξιν ἐρημοῦν
From LSJ
ἔτυχες εἰς τὴν μάχην ὑπὸ τοῦ στρατηγοῦ πεμφθεὶς → you happened to be sent into the battle by the general
ἔτυχες εἰς τὴν μάχην ὑπὸ τοῦ στρατηγοῦ πεμφθεὶς → you happened to be sent into the battle by the general
abandon one's post, desert one's post