The southern Swedish island of Öja was a strategic location the Baltic Sea when it came to the country’s shoreline defense. Fearing a Russian invasion by sea during the Cold War, the military decided to replace many of the old shore defenses with a new system: the ERSTA artillery battery. In the 1970s, the military built six of these systems, with one stationed in the village of Landsort on Öja. Today, the Landsort battery is the only one that remains. At the time, it was among the most advanced artillery systems…
