Rerebrace

A rerebrace (sometimes known as an upper cannon[1]) is a piece of armour designed to protect the upper arms (above the elbow).

Splint rerebraces were a feature of Byzantine armour in the Early Medieval period.

The rerebrace seems to have re-emerged in England, in the early 14th century.

[2] As part of the full plate armour of the Late Middle Ages and Renaissance the rerebrace was a tubular piece of armour between the shoulder defences (spaulder or pauldron) and the elbow protection (couter).

This medieval armour–related article is a stub.

A rerebrace connected to a pauldron (which would cover the shoulder)
Italian rerebrace, ~1440