When the era of the Condottieri came to a close on Italian soil, military commanders like Ottavio Piccolomini and Raimondo Montecuccoli placed their soldiers at the disposal of the Austrian Emperor, in a war of religion that devastated Germany and caused the loss of 30% of its people, perhaps the greatest tragedy ever endured by Germany. Italian forces fought valiantly (albeit on the losing side) at the Battle of Lutzen and helped win a great victory at the Battle of Nordlingen in 1634 against the Swedes. Ambrogio Spinola and his men meanwhile helped Spain to conquer the Netherlands in battles like the Siege of Breda. This war was perhaps the last one were swords, daggers and pikes played an important role in battle as firearms technology was now becoming more reliable. Italian swordsmen, armed with short swords and daggers were extremely effective at infiltrating the pike squares of their adversaries and at bringing down the defenseless pikemen armed with the long pikes during the brutal "push of the pikes". On the battlefield the so-called "Spada da Lato" or side-sword became the dominant sword type. At the same time in the cities of Italy the sidesword evolved into a new type of sword, used in a civilian setting for duelling. This civilian sword is known as "La Striscia" or Rapier in English. Frenchmen adopted the Italian duelling sword and mastered it, and it is believed that between 1600 AD and 1700 AD well over 70,000 Frenchmen died in duels, many of them mortally wounded by a Rapier. From the late 16th century, Italian rapier fencing attained considerable popularity all over Europe, notably with the treatise by Salvator Fabris whose "De lo schermo overo scienza d’arme" of 1606 exerted great influence not only in Italy but also in Germany. Fabris was followed by Italian masters such as Nicoletto Giganti (1606), Ridolfo Capo Ferro (1610), Francesco Alfieri (1640), Francesco Antonio Marcelli (1686) and Bondi' di Mazo (1696).