Occupation of the Ruhr
For example, Germany had gone off the gold standard in 1914, and could not effectively return to it because War reparations had cost it much of its gold reserves. During the Occupation of the Ruhr the German central bank (Reichsbank) issued enormous sums of non-convertible marks to support workers who were on strike against the French occupation and to buy foreign currency for reparations; this led to the German hyperinflation of the early 1920s and the decimation of the German middle class.