What happened in ww1 that might explain appeasement?

After World War I, many European nations, particularly France and Britain, sought to avoid another devastating conflict, leading to a policy of appeasement towards aggressive powers like Germany. The harsh terms of the Treaty of Versailles created significant resentment in Germany, fostering a desire for revision and expansion. The trauma and economic instability resulting from the war made countries wary of confrontation, prompting them to adopt conciliatory measures in hopes of maintaining peace. This mindset ultimately contributed to the failure of appeasement as aggressive regimes continued to exploit these concessions.