Lech Wyszczelski is a Polish military historian and author of books on Central European history of the 20th century. A professor at various universities, he is author of roughly 300 books and publications on the leading role of communists in Spanish Civil War and, after 1989 transition, on Polish-Bolshevik War and the Polish Army in the antebellum. Before 1989, during communist rule, officer of the People's Polish Army and prolific author of many communistic propaganda publications, mostly about leading role of the communists in the Spanish Civil War.
He currently holds a post at the Academy of National Defence in Warsaw, the Pułtusk-based Wyższa Szkoła Humanistyczna im. A. Gieysztora, and Akademia Podlaska in Siedlce.
Among the most notable of his books are a series of monographs on various operations of the Polish-Bolshevik War, including the Kiev 1920, Warsaw 1920, Battle at the Outskirts of Warsaw; 13-25th of August 1920 and The Undeclared War. Polish-Russian military activity of 1919. Among the works of a wider scope are Polish Military Thought 1914-1939, What Beck and Rydz Knew, History of Military Thought and Piłsudski's Army. He is also the author of a monograph of the civilian and military radio stations during the Warsaw Uprising of 1944.