The Notitia Dignitatum lists for the Gallic part of the Litus Saxonicum ("the Coast of Saxony") two commanders, and their military units, who were charged with securing the coasts of Flanders (Belgica II), of Normandy (Lugdunensis II), and of Brittany (Lugdunensis III), these commanders being the Dux Belgicae secundae[1] and the neighboring Dux Armoricani et Nervicani.

In 367, an invasion of Britain by several barbarian peoples, almost completely wiping out units of the local provincial forces, killing the coastal commander Nectaridus.

In Childeric's grave, discovered in 1653, Eastern Roman gold coins, a gold-plated officer's coat (paludamentum), and a golden onion button brooch were found.

This combining of civilian and military offices in his hands suggests that Childeric had a prominent position among barbarian army commanders.

As rex or princeps he would also have been entitled to bestow religious and secular offices and the associated titles—such as patricius, comes, and dux—to deserving Teutons or Romans in his domain (regnum).

Their names are the same as the well-known cities of this province: Unlike the vexillarii of other duces, these units are not shown as being under the command of the Dux Belgicae II.