Answer:
reparations
Step-by-step explanation:
In order to bring the World War 1 to an end, The Treaty of Versailles was signed in June 1919 exactly 5 years after the war commenced, which was triggered by the killing of Archduke Franz Ferdinand. Germany was required to pay some money as reparation to the tune of US$33 billion. This money was said to be used to cover damages civilians faced during the war.
Some people in German saw the issue of reparation as one to be humiliating to them and when their country could not pay as expected, France took over Ruhr, a polycentric urban area in Germany, in order to enforce payments.