Question

discuss the main cause of first war in detail​

Answer 1

Answer:

On June 28, 1914, the Archduke Franz Ferdinand of Austria was assassinated by Gavrilo Princip. ... Following the assassination, Austria-Hungary issued an ultimatum to Serbia, which was rejected and led Austria-Hungary to declare war against Serbia, with German support

Answer 2

Answer:

Here is your answer

Explanation:

First world war was happened because of the extension of the country of Germany and the growth of USSR and because of the downfall of British empire.