Other words that go with the same meaning of common knowledge include Ongoing, existence, widespread, popular, etc.
Explanation:
Common knowledge can be described as the thinking or idea that is commonly known to all. It simply means knowledge that is common to the people. Common knowledge has to be a knowledge that is easy and simple with no different meanings from where it is being used.
The main way in which the end of WWI, including the Treaty of Versailles, affected Germany was that it made them pay harsh reparations, which plunged their economy into despair.