In 1923, Robinson was in charge of the AM-Apparat for military and political work in the Rhineland and was Political Director of the Young Communist League of Germany's Ruhr district and attended conferences in Berlin, where he met his partner He took part in the fighting against the occupation of the Rhine and Ruhr area by French troops. Robinson became a member of the Communist Party of Germany (KPD) and made several visits to the Soviet Union with Schabbel. In 1924, Robinson was director of the AM-Apparat for Central and Eastern Europe. In 1924, Robinson published a leaflet, under a pseudonym,"Harry", along with Grigoriy Zinoviev, director of Comintern, titled: "L'I.C.J. en luttle contre l'occupation de la Ruhr et la guerre". Between 1928–1930, Robinson assisted General Muraille, Chief of Soviet espionage in France.