Rome vs Han essay- want get some opinions

[Tarbicus]

Except that the Romans kept a far more open formation than earlier phalanx armies. The whole point of this is to give each soldier more room to manoeuvre (e.g. swing a sword).

There's a question mark over the width for each soldier in formation. Considering the size of a scutum, three feet per legionary isn't that much room if that's the measurement you accept. It also depends on what period of Roman history you're talking about, most likely.