Prussia and its predecessor, Brandenburg-Prussia, were involved in numerous conflicts during their existence as nation-states. During their military engagements they often fulfilled the role of a supporting power, especially in the 17th century. In the 18th century Prussia began to adopt an independent role in the conflicts of that time; at the latest by the time of the Silesian Wars. Prussia's Army won major victories like at Leuthen, Leipzig, Waterloo, Königgrätz and Sedan but also suffered devastating defeats such as at Kunersdorf and Jena-Auerstedt.