In March 1921, French and Belgian troops occupied Duisburg, which under the Treaty of Versailles formed part of the demilitarized Rhineland. In January 1923 the whole Ruhrgebiet was occupied as a reprisal after Germany failed to fulfill World War I reparation payments as agreed in the Versailles Treaty. The German government responded with "passive resistance", letting workers and civil servants refuse orders and instructions by the occupation forces. Production and transport came to a standstill and the financial consequences contributed to German hyperinflation and ruined public finances in Germany and France, as well as several other countries. Passive resistance was called off in late 1923, allowing Germany to implement a currency reform and to negotiate the Dawes Plan, which led to the withdrawal of the French and Belgian troops from the Ruhr in 1925. However, the occupation of the Ruhr caused several direct and indirect consequences on the German economy and government. Due to the lack of production caused by foreign occupation, the German economy lacked the domestic abilities to pay war reparations without intentionally causing inflation. Moreover, the government became increasingly unpopular due to its "passive resistance" to German production. The halt in domestic production made war reparations impossible to pay.