The SouthIron railroad is the only railway in the Darb Sea region. The lack of a well-developed rail system can be attributed to the regional connectivity facilitated by the Tob River and the Darb Sea. In the 1950's, however, Grenna began to develop their extractable resource industry and needed a reliable way to ship heavy cargo to facilities in Yandi and to the ocean for global export. In cooperation with several countries to it's north, Grenna funded the construction of ___ km of track running from it's northern border to the port of Tobmuth.

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