The treaty of Versailles was a peace breaker (apparently), therefore, ending World War I. It brought Germany to great suffering; "...starving the children..." - I don't remember who that was by, but its important quote to know. That's only the partial speech, search up the speech and hopefully, you'll find it, otherwise ask your History teacher.
Nine nations created by the Treaty: Poland, Estonia, Finland, Czechoslovakia, Hungary, Yogoslavakia, Latvia, Estonia, and Austria. Germany was deprived of 12.5 percent of population, 10 percent of the land, all of its colonies, 16 percent of its natural resources (steel, gold etc)...War Guilt Clause 231... These are some important notes to take. However, the allies did not cut off their oil supply, this, in turn, helped Germany perp for WWII. If you're writing about Hitler's Rise to Power, you could also include the Policy of Appeasement, and ofc the Treaty of Versailles.
It is likely that without the printing press, the protestant reformation would have been crushed in its infancy by the Catholic Church as had earlier efforts at reformation.
The reformation made it so that people could trade ideas and build coalitions that the jailing of individuals would not effect.
This was started because of the 9/11 attacks in New York. American Troops deployed in Afghanistan to find Osama Bin Laden, who was responsible for the attacks