Martial or Exotic weapon?

[Krieg]

Sure a roman shield might have only been 4' tall, but the real question is how tall were people back then? I'm guessing a little over 5' tall.

According to Vegetius in regards to the early Roman Legions...

We find the ancients very fond of procuring the tallest men they could for the service, since the standard for the cavalry of the wings and for the infantry of the first legionary cohorts was fixed at six feet, or at least five feet ten inches.