Final answer:
France moved troops into the Ruhr Valley in 1923 as a result of a dispute over reparation payments.
Step-by-step explanation:
France moved troops into the Ruhr Valley in 1923 as a result of a dispute over reparation payments. After World War I, Germany was required to pay reparations to the Allied powers as part of the Versailles Treaty. However, Germany struggled to make these payments, leading to tensions with France. When Germany fell behind on its payments, France occupied the Ruhr Valley, an industrial region of Germany, in order to extract resources as a form of payment.
Learn more about Rise of nationalism and tensions after World War I