They both build their own relationship in colonies
The answer is Pan-Slavism
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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Answer:
I think it is the 2 answer
Nazi Germany I hope this helps