The provenance of the photograph is unclear, however it is believed to be held by one of the Polish archives and it was published in numerous well-regarded books on the invasion of Poland in 1939. In the 1972 edition of Battles of Polish September ("Bitwy Polskiego Września") by Apoloniusz Zawilski, the photograph was described as "Cavalry in gallop through Sochaczew" (Kawaleria w galopie przez Sochaczew). It was not included in the revised 1989 edition. In the 1982 book Poznań Army in defensive war 1939 ("Armia Poznań w wojnie obronnej 1939") by Piotr Bauer and Bogusław Polak, the photograph was described as the "Poznań Army in fights in Uniejów region". Some publications identify the unit as the Wielkopolska Cavalry Brigade (Wielkopolska Brygada Kawalerii), which was a part of the Poznań Army. The photograph was also featured in numerous other books, textbooks, web publications and news articles. It also can be purchased from several stock photography agencies, like Getty Images and Alamy, which all claim copyrights.
