πρόμαχος (promachos)

1. fighting before or in front : πρόμαχοι, οἱ, the foremost fighters, champions , (Homer); ἐν προμάχοισιν among the foremost , (Iliad by Homer):—;as adjective, πρ. δόρυ the champion spear, (Sophocles Tragicus)
2. fighting for , πόλεως, δόμων (Aeschulus Tragicus) (ML)