While the Early Access version of the game is being reviewed by Valve I will say some words about the Railway stations in the game :)

Railway stations allow transferring troops and cargos over long distances. That's why they're often positioned near Sea Ports or Supply Depots.

Cargos are delivered to a station by а railroad, then transferred by trucks to the nearest Supply Depot.

So if Supply Depots are near railway stations connected by a railroad, cargos will be transferred between depots in one turn without regard to distance.

If the enemy controls the railroad between stations, the supply will be broken.

We have added animation showing the connection between railway stations and depots. This animation helps to choose the right target to break the enemy's supply system.