The Freikorps Oberland (also Bund Oberland or Kameradschaft Freikorps und Bund Oberland) was a voluntary paramilitary organization that in the early years of the Weimar Republic fought against Communist and Polish insurgents. It was successful in the 1921 Battle of Annaberg and became the core of the "Sturmabteilung" (SA) in Bavaria while several members later turned against the Nazis.