Question

world war 1 was held by whom

Answer 1

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World War I began in 1914, after the assassination of Archduke Franz Ferdinand, and lasted until 1918.

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Answer 2

To understand the long term origins of the war in 1914, it is essential to understand how the powers formed into two competing sets sharing common aims and enemies. These two sets became, by August 1914, Germany and Austria-Hungary on one side and Russia, France, Serbia and Great Britain on the other.