I think that Hitler saw in Austria the chance to increase the number of loyal, German soldiers - Austrians speak German and are culturally similar so it was easy to include them into the German army and so quickly acquire a great number of loyal soldiers who spoke the language and shared the culture with the Germans.
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The United States used the sinking as propaganda to get the country on board for war
Because there main product/export was cotton, so therefore it influenced them the most on the fact that they made more money.
hope this helps:)<span />
