World War 1 which is often referred to as the Great War was a war which involved almost all of Europe, America, Russia and Turkey.
The war began on 28 July 1914 and ended on 11 November 1918. Most notable causes of the war includes the following;
- Politics
- Imperialism
- Secret Alliances
- Nationalism
- Killing of Franz Ferdinand
Among the aforementioned causes of WW1, the Killing of Franz Ferdinand of Austria was the main reason for the conflict.
The killing of Franz Ferdinand infuriated Austria-Hungary.
Austria-Hungary was furious and, with the backing and support of Germany, declared war on Serbia on July 28. This led to Germany declaring war on Russia who were Serbia's ally and invaded France through Belgium. This resulted in Britain declaring war on Germany.
At this point, much of the advanced countries in Europe were already entangled in the war and this forms the basis of my opinion.
Learn more about World War 1 at https://brainly.com/question/446364