In late 1926, while in Drohobych, Gomułka became a member of the illegal-but-functioning Communist Party of Poland ("Komunistyczna Partia Polski", KPP) and was arrested for political agitation. Technically, at this time he was a member of the Communist Party of Western Ukraine, which was an autonomous branch of the Communist Party of Poland. He was interested primarily in social issues, including the trade and labor movement, and concentrated on practical activities. In mid-1927, Gomułka was brought to Warsaw, where he remained active until drafted for military service at the end of the year. After several months, the military released him because of a health problem with his right leg. Gomułka returned to communist party work, organizing strike actions and speaking at gatherings of workers at all major industrial centers of Poland. During this period he was arrested several times and lived under police supervision.