Army lists in Dux Bellorum are defined , but loosely and allow for a lot of flexibility in the forces you raise. Generally you are looking at between five and ten units, plus up to three strategies - strategies might be unique unit types like monks or wardogs, or they could represent unit upgrades etc. My starter army lists, as I may have mentioned before, were driven by the models I already had at hand, either painted or in the lead pile.
We will be playing our games based in the north of Britain (c. AD 500) to permit Picts, Saxons, Irish, Welsh and Romano-Brits all to have a go. Here is my Romano-British army, sans strategies. It stands at 29 points, allowing me three points to spend on a strategy of my choosing during any given battle. Nominally it is the war-host of Rheged, the British kingdom straddling the Solway and taking in the regions of Cumbria, Dumfries and Galloway (perhaps). In AD 500, that might (or might not... I love this period) make my commander king Meirchion Gul - Meirchion the Lean.
These are two units of noble riders, the experienced warrior caste of Rheged.
The local Rheged infantry consist of a shieldwall muster and a body of archers.
The infantry is supplemented by two shieldwalls of foederati - fierce Germanic mercenaries. The unit on the right - fully equipped in chainmail, swords and the odd wolf skin - will be used as a noble shieldwall; at least to begin with. The other unit will be an ordinary shieldwall. I have stuck with a red colour theme with this army, except for the foederati whom I have themed in blue. This way they can form the basis of a future Saxon army, should the need arise.
The army assembled; and to top it all off, at the back is a small hamlet for them to raid or defend (as the notion takes them).