Question

Write a big note on first world war I want reasons also

Answer 1

The answer to this question is
World war 1 began in 1914 after the assassination of Archduke Franz Ferdinand, and lasted till 1918 . During the conflict Germany , Austria Hungary , Bulgaria and the Ottoman Empire ( the central power) fought against Great Britian , France , Russia , Romania , USA ( the allied power ).
The new military technologies and the horrors of trench warfare , World war 1 saw unprecedented levels of carnage and destruction .
By the time the war was over and the Alliance powers claimed their victory.

Main points : 16 million deaths of soldiers and civilians.

NOW , REASONS.

1. Mutual Defence Alliance
2. Imperialism
3. Militarism
4. Nationalism
5 . The last one is main That was

Immediate Cause : Assassination of Archduke Franz Ferdinand.

hope it helps u.

Answer 2

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Satrted in 1914

Ended in 1918

Between central and allied powers