How did the assassination of archduke franz Ferdinand eventually lead to world war 1?

Got dis

Explanation:

the Assassination led to world war 1 mainly because of alliances with other countries. This is how it went down. Austria-Hungary declares war on Serbia, Germany declares war on Russia, France, and Belgium. Britain declares war on Germany. Austria declares war on Russia. Montenegro declares war on Austria. France declares war on Austria. Britain declares war on Austria. Montenegro declares war on Germany. Japan declares war on Germany. Austria declares war on Belgium.

And there you have it the start of WW1