Germany could not afford to pay the second instalment of reparations
January 1923, French and Belgium troops invaded the Ruhr (part of Germany near France) + took control of all factories and mines
They took all materials, machinery, goods back to France and Belgium in place of the reparation payments due
Gov ordered passive resistance (people go on strike) but still needed to pay workers
Soldiers arrested striking workers and brought French + Belgium workers to replace them
To pay the striking workers, the gov printed more money, leading to hyperinflation