What was a significant indication that appeasement would not deter Hitler's expansionist ambitions?

The occupation of Czechoslovakia despite the Munich Agreement is a clear indicator that appeasement would not deter Hitler's expansionist ambitions. The Munich Agreement, signed in 1938, was meant to resolve the Sudetenland crisis peacefully, where Britain and France allowed Germany to annex parts of Czechoslovakia in hopes of satisfying Hitler's demands and preventing further conflict. However, Hitler's subsequent invasion of the rest of Czechoslovakia in March 1939 demonstrated that he was not interested in a genuine diplomatic resolution or respecting agreements made with other nations. Instead, he was emboldened by the lack of effective opposition and continued to pursue aggressive expansion, negating any notions that appeasement could work.

In contrast, initial acceptance of the Treaty of Versailles did not inherently suggest Hitler's future actions, as it was a significant part of post-World War I settlements that many nations grappled with extensively. The signing of the Pact of Steel in 1939 illustrated a strategic alliance with Italy but was not as indicative of Hitler's broader ambitions being unfettered by appeasement. Lastly, the British response to the annexation of Austria, while an important moment, did not carry the same weight or consequences as the