The 80 Years War (1568-1648) overlapped the 30 Years War (1618-1648). The main protagonists of the Dutch Revolt, Spanish and Dutch, are covered in the Organisation in the Eighty Years War. Other nations (Swedes, French, Imperialist, etc) are covered here.
The Spanish were still using the Arquebus in the 30 Years War. DBR annoyed me for several reasons but the fixed ratios of musket to arquebus and the relatively ineffectiveness of the arquebus were two of them, particularly because the Spanish came out badly in this formula. As a result I wanted to find out what the difference was and why the Spanish may have retained the arquebus longer than others (if, in fact, they did).