He employed innovative squadrons with a core of two companies of pikemen and a company of musketeers on each flank.  
Among his military reforms was the conscription of every young man in his country for a commitment of twenty years.  He employed innovative squadrons with a core of two companies of pikemen and a company of musketeers on each flank.  After defeating his cousin, Zygmunt III, he was free to concentrate on the continent.  This son of Charles IX did so to the dismay of Graf von Tilly at in Pomerania and at Breitenfeld.  FTP, name this man killed at Lutzen, the Swedish monarch during the first half of the Thirty Years' War.
Among his military reforms was the conscription of every young man in his country for a commitment of twenty years.  
Gustavus Adolphus or Gustav II Adolph