Anschluss was the name of the union of Austria and Germany in March 1938. It happened after the collapse of the Habsburg. After the annexation, the US criticized the chaos in Germany and formulated a foreign policy in order to respond to Hitler’s aggressive foreign policy.
This was a problem for the US and the allies because it showed that Hitler had no care for peace and got even more strongly with the annexation of Austria - it subsequently increased the size of Germany’s military -.
The correct statement is that anschluss presented a challenge to the United States and its allies after Hitler came in aggressively for the annexation of the US foreign policy.
The anschluss was one of the most significant events that was a symbolization of absolute violence by Austria and Germany and annexation towards the US and its allies.
The union of Austria and Germany became a powerful acquisition in the hands of Germany, as it had proven that it was ready to give replies by the methods of violence only.
This became a challenge for the US and the allied nations, as they were put in a situation where they could not improve their relations with Germany, headed by Adolf Hitler.
Hence, the anschluss became a big challenge in front of the US and other allied powers by putting itself in a state of war in the year 1938 before the World War II began.
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