rear-guard
From LSJ
ὃς ἂν βούληται τῆν γῆν κινῆσαι κινησάτω τὸ πρῶτον ἑαυτόν → let him that would move the world first move himself
English > Greek (Woodhouse)
substantive
P. ὀπισθοφύλακες, οἱ (Xen.).
be the rear-guard, v.:P. ὀπισθοφυλακεῖν (Xen.).