Belgrade Museum of Military History Gladius

[Tarbicus]

I find it that it is interesting that Legio IIII would be tasked/responsible for border patrol/security responsibilities. I would think that the local auxiliaries would normally be tasked with this mission.

Why was the owner an auxiliary?

I did a quick scan through Spaul, and I could not find any auxiliary units with a name close to IIII Scythica in that part of the world.

http://www.romanarmy.com/cms/content/view/33/113/1/1/
Ritterling puts IIII Scythia in Moesia/Serbia in 33 AD. He also believes it to be one that Augustus took up BC some time, which all tallies perfectly with the type of gladius.