Protection Squadron; a major Nazi organization that grew from a small paramilitary unit that served as Hitler's personal body guard into militarily what was in practical terms the fourth branch of the Wehrmacht. It was not legally a part of the military (and therefore wore the national emblem on the left sleeve instead of over the right breast pocket). "SS" is formed from (S)chutz(s)taffel. Made up of the following branches:

• Allgemeine-SS – "General SS", general main body of the Schutzstaffel made up of the full-time administrative, security, intelligence and police branches of the SS as well as the broader part-time membership which turned out for parades, rallies and "street actions" such as Kristallnacht; also comprised reserve and honorary members
• SS-Totenkopfverbände – "Death's Head Units", responsible for the concentration camps
• SS-Verfügungstruppe – military "dispositional" (i.e. at Hitler's personal disposal) troops organized by the SS in 1934
• Waffen-SS – "Armed SS", created in August 1940 with the amalgamation of the Verfügungstruppe, the Leibstandarte SS Adolf Hitler (LSSAH) and the combat Standarten of the Totenkopfverbände.