 The military arm of the Polish Underground State consisted primarily of various branches of the Armia Krajowa (AK) and, until 1942, the Union of Armed Struggle. This arm of the state was designed to prepare the Polish society for a future fight for the country's liberation. Apart from armed resistance, sabotage, intelligence, training, and propaganda, the state's military arm was responsible for maintaining communication with the London-based government in exile, and for protecting the civilian arm of the state.
