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After World War I, primarily France and Belgium among the Allied powers, aimed to prevent future threats from Germany. This was mainly because France had been invaded twice by Germany, in 1870 (as Prussia, during the Franco-Prussian War) and in 1914 at the beginning of World War I. As a consequence, France, with considerable support from Belgium, wanted to impose strict conditions on Germany in the Treaty of Versailles to limit its military capabilities and weaken its economy to eliminate its ability to wage war again. Other countries, such as the United Kingdom and the United States, were also interested in preventing German aggression but were more moderate in their approach compared to France.
Extra: The Treaty of Versailles, signed in 1919, was the official peace treaty that ended World War I. In this Treaty, Germany was forced to accept responsibility for the war and to make extensive territorial concessions and pay reparations. The Treaty had several controversial provisions. The most significant and contentious of these were the "war guilt" clause, which placed the blame for the war on Germany and its allies, and the reparations, which imposed heavy financial penalties on the German economy. Additionally, the Treaty restricted the size and capability of Germany's armed forces and allowed the Allies to occupy parts of western Germany. These measures were put in place to control German power and deter any future aggression. However, many historians and economists believe that the severity of these terms and the resulting political and economic instability in Germany contributed to the rise of Adolf Hitler and the outbreak of World War II.