How did the policy of appeasement contribute to the start of world war first?

The policy of appeasement, primarily exemplified by the actions of Britain and France in the 1930s, allowed aggressive powers like Nazi Germany to expand their territories without facing significant opposition. By conceding to Hitler's demands, such as the remilitarization of the Rhineland and the annexation of Austria, Western democracies inadvertently encouraged further aggression. This emboldenment ultimately led to the invasion of Poland in 1939, triggering World War II as Britain and France declared war in response. The failure to confront early violations of the Treaty of Versailles set a dangerous precedent that undermined collective security efforts.