In which year was this Nazi Party paramilitary rank created that Emil Ketterer belonged?
Obergruppenführer Obergruppenführer (] , "senior group leader") was a Nazi Party paramilitary rank that was first created in 1932 as a rank of the "Sturmabteilung" (SA), and adopted by the "Schutzstaffel" (SS) one year later. Until April 1942, it was the highest commissioned SS rank, inferior only to "Reichsführer-SS" (Heinrich Himmler or RFSS, which was the internal SS-abbreviation for Himmler) Translated as "senior group leader", the rank of "Obergruppenführer" was senior to "Gruppenführer". A similarly named rank of "Untergruppenführer" existed in the SA from 1929 to 1930 and as a title until 1933. In April 1942, the new rank of "SS-Oberst-Gruppenführer" was created which was above "Obergruppenführer" and below "Reichsführer-SS".
Ordnungspolizei The Ordnungspolizei (] , "Order Police"), abbreviated Orpo, were the uniformed police force in Nazi Germany between 1936 and 1945. The Orpo organization was absorbed into the Nazi monopoly on power after regional police jurisdiction was removed in favor of the central Nazi government ("Verreichlichung" of the police). The Orpo was under the administration of the Interior Ministry but headed by members of the SS until the end of World War II. Owing to their green uniforms, Orpo were also referred to as "Grüne Polizei" (green police). The force was first established as a centralized organisation uniting the municipal, city, and rural uniformed police that had been organised on a state-by-state basis.