Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Jan Jagmin-Sadowski (April 24, 1895 in Grojec October 5, 1977 in Warsaw), was a general of the Polish Army, having served in World War One as a member of Józef Pi sudski's legions, as well as commanding Polish forces during the invasion of Poland in 1939.In the early 20th century, Sadowski studied mechanics at the Lviv Polytechnic, and there he got in touch with Polish independence movement. He became a member of the Polish Socialist Party - Revolutionary Fraction, as well as the Polish Rifles and the Sokó movement.