In May 1921, Buchrucker headed a supply center for the Freikorps in Cottbus during the Silesian Uprisings. He was one of the leading functionaries of the Bradenburg Heimatbund, along with his long-time friend Wilhelm von Oppen. The Heimatbund was a successor organization to the resident services that were dissolved on April 8, 1920 under pressure from the Entente. Buchrucker also maintained contacts with Gerhard Roßbach and his officially dissolved Freikops, whose members were camouflaged on agricultural estates in Bradenburg, Mecklenburg, and Pomerania.