In 1922, when the next payment was due, the Germans announced that they could not afford to pay
The French and Belgians didn't believe them and decided to take what they were owed by force
In January 1923, 60,000 French and Belgian soldiers marched into the Ruhr, a rich, industrial area of Germany
They took control of every factory, mine and railway in the region
They also took food and goods from shops and arrested any Germans who stood up to them
The consequences of this invasion were remarkable
They led to the hyperinflation of 1923 and loaves of bread costing 201 billion marks