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Who declared war against whom which led to the outbreak of World War I? *

User JGurtz
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2 Answers

6 votes

Answer:

Austria-Hungary on Serbia

User Chinthaka Dinadasa
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1 vote

Answer:

Austro-Hungarian AKA Austro-Hungarian Empire AKA the Dual Monarchy

Step-by-step explanation:

User Volkan Sonmez
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