The "SS-Begleitkommando" was expanded and became known as the "Führerbegleitkommando" (Führer Escort Command; FBK). By 1937, the unit had grown to 37 members. The FBK continued under separate command and provided close, personal security for Hitler. Additional members for the FBK were drawn from the Leibstandarte SS Adolf Hitler (LSSAH). Hitler used them for guard duty, but also as orderlies, valets, waiters, and couriers. While nominally under the control of "Reichsführer-SS" Heinrich Himmler, the FBK took their orders direct from Hitler, much to Himmler's frustration. For administrative purposes, the FBK was under the control of the LSSAH. That did not change the fact the unit received their orders from Hitler and in later years from his chief adjutant, Julius Schaub, through the day-to-day operational orders given to Johann Rattenhuber, chief of the RSD.