Herman Hugo. De militia eqvestri antiqva et nova. Antwerp, 1630.
This is one of the earliest manuals on the rules, tactics, and handling of cavalry and was published at the height of the Thirty Years War (1618–1648). It was written by a military chaplain, the Jesuit Herman Hugo (1558-1629), better known as the author of the vastly successful emblem book Pia Desiderata. Whereas the title page, engraved by Cornelis Galle, a pupil of Peter Paul Rubens, is allegorical in the full-blown baroque manner, the plates inside the book are entirely matter-of-fact diagrams showing cavalry field manoeuvres. Hugo died on the field of battle.