20th-century Polish historians

Władysław Bortnowski (12 November 1891 – 21 November 1966) was a Polish historian, military commander and one of the highest ranking generals of the Polish Army. He is most famous for commanding the Pomorze Army in the Battle of Bzura during the invasion of Poland in 1939. He is also notable for serving as president of the Józef Piłsudski Institute of America between 1961 and 1962.

Artur Śliwiński (Polish: [ˈartur ɕliˈviɲskʲi]; 17 August 1877 – 16 January 1953) is the 8th Prime Minister of Poland from 28 June – 7 July 1922. In 1915 he had presided over the National Central Committee, which sought Polish independence from partitioning powers.