I believe the mission text of the map Raid on the Refinery also states that the facility (the blackcliff metal works) is one of the Baronies'.
That tells us several things:
- the Baronies have a strong and technologically advanced industry
- they probably don't rely on scrap as much as the Angleans or the Arashi League
- they rely heavily on slave labour, as stated in the text
- there are several of these big factories and the labourers are transported between them. I am still not quite sure why they have to change factory in the first place though. If they don't have enough workers and the transports are dangerous, why not concentrate on one facility and dismantle the others? Maybe the factories are specialised on different goods?
If you look at the map (
http://www.mobbly.com/wp-content/uploads/2013/03/Guns_of_Icarus_Map.jpg) you can see that Blackcliff is located in an actually rather secure spot, between Chaladon and the Mainland Baronies. As the Chaladonians seem to be a more peaceful nation, one would think that the metal works should be safe from raids.
The fact that they still seem to be a major battlefield shows once again how valuable industry is in this world.