Oberkommando des Heeres
In the 1930s Lötzen was the garrison of several military units of the Wehrmacht as a Sub-area Headquarter of Wehrkreis I, which was headquartered at Königsberg. Staff-, maintenance- and guardtroops of Hitler's headquarter Wolfsschanze and the Oberkommando des Heeres (OKH, army high command) were also based in or nearby Lötzen. The OKH was based at the Mauerwald area, ca. 10 km north of Giżycko, an undestroyed bunker system.