What makes MRU extraordinary is the scale and ambition behind it. Between the rivers Oder and Warta, the original designers wanted not just scattered pillboxes, but a hidden fortress metropolis. In the central section near Międzyrzecz and Pniewo, a network of tunnels — some 32 km long and reaching depths up to 40 m — linked dozens of concrete forts, bunkers, barracks, workshops, storage areas, and transit shafts.
Inside there were railway tracks, ammunition warehouses, power rooms, troop quarters — enough to house tens of thousands. It was less a defensive line and more a self-contained underground city designed for war.
The article is not finished. Click on the next page to continue.
The article is not finished. Click on the next page to continue.
Next page
