Question

which incident marked the beginning of the world war ​

Answer 1

Answer:

Sarajevo crisis: the assassination of Archduke Francis Ferdinand by an secret organization of Serbia named 'Union of Death' or 'Black Hands' on 28 of june 1914. it made Austria declare war on Serbia on 28 July 1914. Russia came to support serbia. seeing this, Germany declared war on Russia on 1 August 1914 and on France on 3 August 1914. Britain declared war on Germany on 4 august 1914.

Answer 2

Answer:

On September 1, 1939, just before Adolf Hitler's invasion of Poland that marked the beginning of World War II, Zygmunt Klukowski, a young Polish doctor, confided in his diary that everyone was talking about war.

This incident marked the beginning of world war.