Description in Diego Duarte collection, Antwerp 1682: "No 62 Een stuck op paneel denslagh van de Amasoonen vol werekx van syn vroege manier. Het landtschap offte verschiet is geheel van den Fluweelen Bruegel, guld.100." (#62: a piece on panel the battle of the Amazons with many details in his [Rubens's] early manner. The landscape or distance is entirely by [Jan] Velvet Brueghel. 100 guilders)
The Potsdam picture has been slightly overpainted to make the figures more modest.
Has been attributed to Otto van Veen, clearly wrongly.
Of the two versions of this subject, the Potsdam one is probably the "prime," although that is a difficult concept when it comes to his studio methods.
Overall composition very loosely based on a print after Giulio Romano's Battle of Constantine at the Milvian Bridge (Vatican); engraved in the 16th century by the Monogrammist SK.