Possible Clues:

• Roman army grouping
• Army
• Great number, say, eaten by cat
• One foot on the end with one on the bottom from Rome
• Large body of soldiers, say, outflanked by hero
• Veterans' group, informally
• Division of ancient Roman army
• Many on charge
• Military force — in Lego (anag)
• For the Romans, for instance, in the big fighting cat