As RSD commander Rattenhuber was responsible for securing Hitler's field headquarters. In particular, a battalion guarded the Wolf's Lair near the town of Rastenburg, now Kętrzyn in Poland. Rattenhuber's deputy, Peter Högl was appointed Chief of RSD Department 1 (responsible for the personal protection of Hitler on a day-to-day basis during the war). The Wolf's Lair had three security zones. "Sperrkreis 1" (Security Zone 1) was located at the heart of the Wolf's Lair. Ringed by steel fencing and guarded by RSD and FBK men, it contained Hitler's bunker and ten other camouflaged bunkers built from thick steel-reinforced concrete. Hitler first arrived at the Wolf's Lair on 23 June 1941 and departed for the last time on 20 November 1944. Overall, he spent over 800 days there during that three and half year period.