André Geraque Kiffer 
European Wars In The 16th Century, 1494 To 1598 [PDF ebook] 

In the simulation, the German Habsburg House, under the leadership of the emperor Charles V player, will deny its support to the Catholic Church and the Pope in their war against the Protestant Reformation in their territories. This conciliatory tone is intended to keep any religious differences within the Holy Roman-German Empire under control, in favor of political and social peace. On the other hand, there is a calculated risk of losing the support of the Papal States and the Spanish Habsburgs (radical Catholics) in the war against the Ottoman Empire.