Most read articles by the same author(s)

• Karol Sacewicz, Tactical operations of the communist people’s movement and the anti-fascist movement in the materials published by the Alliance for Combating Communism – an analysis of organized social anti-communist attitudes in Poland in the interwar period , Echa Przeszłości: No. XX/1 (2019)
• Karol Sacewicz, "The Case of the Emergency Organization of Polish Patriots" as Described by Polish Nationalist and Socialist Press in 1924-1926 , Echa Przeszłości: No. XVII (2016)
• Karol Sacewicz, United Front Concepts of the Communist Workers Party of Poland / the Communist Party of Poland in the Light of a Document of the Ministry of the Interior of 23 November 1936 , Echa Przeszłości: No. XVII (2016)
• Karol Sacewicz, The Communist Movement in Poland in 1918-1923 in the Light of Operational Materials and Reports of the Interior Ministry of the Second Republic of Poland , Echa Przeszłości: No. XIII (2012)
• Karol Sacewicz, Rafał Wnuk, "In the times of the first Soviets". The Polish conspiracy on the Eastern Borderland of the Second Polish Republic (September 1939 - June 1941) , Echa Przeszłości: No. IX (2008)
• Karol Sacewicz, The National Armed Forces against the communist underground. The orders of the secret service of 15 March 1943 , Echa Przeszłości: No. IX (2008)
• Karol Sacewicz, Operation “Cedar Falls” (8–27 January 1967) in the light of the reports of the Second Department of Polish General Staff , Echa Przeszłości: No. XXIII/2 (2022)
• Karol Sacewicz, The Organisation and Operations of the Communist Movement inPoland in 1918-1925 in the Light of the Report of the Security Department of the Ministry of Internal Affairs , Echa Przeszłości: No. X (2009)
• Karol Sacewicz, The goals and the scope of cooperation between the Ministry of Internal Affairs and the Ministry of Foreign Affairs in counteracting the development of communist organizations in the Second Republic of Poland in the light of Jan Bach's letter of 19 Februa , Echa Przeszłości: No. XI (2010)
• Witold Gieszczyński, Karol Sacewicz, A Tribute to Professor Tadeusz Filipkowski (1933-2009) , Echa Przeszłości: No. X (2009)