4. The sale of indulgencies was one.
5. He posted the 95 theses.
15. Treaties was one.
16. The sinking of the Lusitania and the Zimmerman note were 2

18. Treaty of Versailles - Germany losing a certain amount of its own territory to a number of surrounding countries, being stripped of all its overseas and African colonies, and its ability to make war again was limited by restrictions on the size of its military. Germany also acknowledged and agreed to respect the independence of Austria. Germany's foreign minister, Hermann Müller, undersigned it on June 28, 1919. The treaty had provided for the creation of the League of Nations, a major goal of US president Wilson. The treaty officially ended WWI.