[G]uthrie has done a great service to students of the art of warfare in early modern Europe. . . . Where Guthrie really shines is in his analysis of leading personalities and his battle narratives. These sections are solidly researched, exhaustive, and to a large extent previously unavailable in a single treatment, certainly so in English. . . . [G]uthrie has made a major contribution to the English-language literature on the Thirty Years' War….^IThe Later Thirty Years War^R is a profoundly useful book.