The FBK accompanied Hitler on all his travels and was always present at the different "Führerhauptquartiere" (Führer Headquarters; FHQ) in various parts of occupied Europe during World War II. Wherever Hitler was in residence, members of the FBK and RSD were present. The FBK provided close security protection and would also be posted as guards in corridors leading to Hitler's office in places such as the Reich Chancellery. The RSD men patrolled the grounds. For special events, the number of LSSAH guards, who provided an outer ring of protection was increased. By 15 January 1943 the FBK had expanded to 31 SS officers and 112 men. Thirty-three were used for escort duties, rotating in groups of eleven. The rest were used as guards for Hitler's residences "not in use at the time" and other duties.