The 30 Years' War began as a struggle between German Protestant princes & this Catholic "Empire"
Overall, the struggle was between the Holy Roman Empire, which was Roman 
Catholic... [DOC] [TLE] THE THIRTY YEARS' WAR - History World [PAR] THE THIRTY YEARS' WAR including Ingredients of a complex war, ... out 
between 1618 and 1648, in a continuous struggle which results eventually in a ...