Question

when world first war happen?​

Answer 1

Answer:

world war 1 period

28 july 1914 - November 1918

Explanation:

The assassination of Austrian Archduke Franz Ferdinand on 28 June 1914 set off a chain of events that led to war in early August 1914. ... The Austro-Hungarian Empire attacked Serbia in response. Germany supported Austria-Hungary, while Russia sided with its traditional ally, Serbia

Answer 2

Answer:

• the 1st world war was fought on 28th huky 1914

$\rm \: causes = = >$

• serbian nationalism
• conflicts over alliances
• militarism
• European expansionism