advanced guard; vanguard
Ancient Greek word, found 18 times in the texts on Socratos.
Polybius, Histories 1.76.5: καὶ τοὺς μὲν ἀπὸ τῆς πρωτοπορείας ἀναστρέψαντας σπουδῇ ποιεῖσθαι τὴν ἀποχώρησιν ἐκέλευσε· τοὺς δʼ ἐπὶ τῆς οὐραγίας ἐξ ἀρχῆς ὑπάρχοντας ἐξ ἐπιστροφῆς περισπῶν ἐξέταττε πρὸς τὴν τῶν πολεμίων ἐπιφάνειαν.