From the manual:
Depot: It can be built at a cost of two Supply Wagons or by two transports ships if a harbor is in the region. They can
also be destroyed. Depots are able to stockpile and pass on Supply during the Supply Distribution Phase. A good network
of Depots is critical to move Supply from your rear areas to
the front. Presence of a depot inside a city is indicated by tents and crates.
Important Note: Evaluate the potential bottlenecks in your Supply network by checking which rear-area cities stockpile too much Supply
that should be available at the front line (the Supply Filter will help you with that). Create a ‘grid’ of Depots to alleviate the problem, and
watch out for towns (Level 1 to 3 cities) which can’t push Supplies forward unless they contain a Depot.
1) It says a depot can be build at a "cost of two Supply Wagons". I have some regions with a few units + 2 Supply Trains (horse drawn wagons) inside that dont have a depot yet.
Still i cant select the option "Build Depot". Why ?
2) In another region i already have a depot but my army inside this region still shows the "Build Depot" option available. Why ? Will it just upgrade the existing depot ?
3) "watch out for towns (Level 1 to 3 cities) which can’t push Supplies forward unless they contain a Depot"...now that sounds strange...
Does this mean that while supplies can be pushed forward from a city with a depot trough other regions with nothing else but a railroad inside to another depot or the frontline this supplies will get "stuck" if they hit a level 1 to 3 city without a depot ? Even if there is a railroad or road going through this city towards other regions ?
So basically level 1-3 city's act like road blocks for supply is this correct ?
Basically that would mean a supply chain like this:
City with Depot -> Region with nothing but railroad -> City Level 4 -> Region with railroad and my unit inside, this unit is supplied.
City with Depot -> Region with nothing but railroad -> City Level 1 (No Depot) -X Region with railroad and my unit inside, this unit is NOT supplied.
Is this how it works...sounds really strange...can you please explain ?