OK, let's review what the Ersatzheer, as well as some bureaucrats from (O)rganisation (T)odt and the (R)eichs(A)rbeits(D)ienst transferred to our disposal. A Construction Column, a Road Maintenance Column, a Bridgin Construction/Maintenance Column and a Supply Column. We're lucky in a sense, because that simply means we still can give the units of 106th Infantry Division a rest (they've just arrived from extensive training at Grafenwöhr training area in Germany).
I switched the supply filter on, why? Because we have to take the availability and distribution of supplies into account, too. After all... would you work while being on half ration and no fodder/fuel for the horses/machinery? Certainly not!
Survey the terrain and you might have already noticed, that urban areas, forest & hills already got an entrenchment value of 15%. That's quite an advantage for our purpose(s).
Furthermore, it's more or less obvious where we should start our 1st line of defence. We can't fortify or hold a front-line of more than (guideline) 15km with one division. That's about 6 hexes (2.5km ea.). Why not; after all we got 9 Inf.Btl. available, no? Well...we need reserves, don't we? Hence we should consider a frontage of max. 6 hexes... but where and how?