How did the assassination of Archduke Franz Ferdinand lead to ​ World War I ​ ? War broke out when Serbia refused to agree to a list of Austrian demands after the assassination.

Troops protecting the archduke retaliated by attacking Serbian military positions after the assassination.

Russian troops invaded Serbia after the assassination, seeking revenge for the death of the czar’s cousin.

Germany ended diplomatic relations with Austria after the assassination, resulting in the outbreak of war.

The murder of Archduke Franz Ferdinand outraged Austria-Hungary.

Explanation:Austria-Hungary was furious and, with Germany's support, declared war on Serbia on July 28. Within days, Germany declared war on Russia—Serbia's ally—and invaded France via Belgium, which then caused Britain to declare war on Germany.The assassination of Archduke Franz Ferdinand lead to the "war to end all wars" because it set off a series of war declarations on numerous nations because of alliances that have been formed. ... This warfare took a very long time because it took months to advance just a few hundred yards.It ended on the 11th of November 1918. Difference in policies were to blame, although the immediate cause of World War one was the assassination of Austria's Archduke Franz Ferdinand. The war started mainly because of four aspects: Militarism, Alliances, Imperialism and Nationalism.

Following the assassination of Franz Ferdinand, Austria Hungary was hella mad about it, so they went to Germany, and was like hey, help us get revenge on Serbia. So the two of them teamed up and declared war on Serbia on July 28th. Shortly after (a couple of days) Germany declares war on Russia, and then after Serbia's ally invaded France, that pushed Great Britain to declare war on Germany.

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