Much of their resources had been depleted during the war, especially on the losing side. What also added to this factor was that many towns and cities had been destroyed, and much of the farmlands and crops were damaged also. So not only were the governments weakened after the war, they were also lacking soldiers to defend themselves in case of another war. Germany eventually built up an military to start WWII later on in 1938 - 1939.
The German economy started to clasp under the heaviness of these outside and inward pressing factors. As the principal reimbursements were made to the Allies in the mid 1920s, the estimation of the German imprint sank radically, and a time of excessive inflation started. In mid 1922, 160 German imprints was identical to one US dollar. By November of 1923, the money would devalue to 4,200,000,000,000 imprints to one US dollar.
"i want to hold your hand" was the first beatles' song to break through to #1 in the united states.
God bless!