6th century AD Roman soldier

[Flavivs Aetivs]

There are germanic examples that survive, such as one from Gammertingen. They usually have 1/2 or 3/4 length sleeves and extend to the knees.

The shortest ones are depicted on the Apamea mosaics, which extend to the upper thigh and are sleeveless, almost like Principate armor, but they lack the doubler.