Answer :
The assassination of Austrian Archduke Franz Ferdinand (June 28, 1914) was the main catalyst for the start of the Great War (World War I). After the assassination, the following series of events took place: • July 28 - Austria declared war on Serbia.
Why do some historians believe that Germany wanted to start World War I?
Today's historians generally concur that Germany desired to ignite the war. German authorities believed that war was inevitable since they were encircled by foes (France and Russia). They believed that Germany had a stronger chance of winning the war the earlier it started.
Austria-Hungary had thought that they could seize control of Serbia quickly and that Serbia's ally, Russia, wouldn't risk starting a major conflict to assist Serbia. But their assumptions were flawed. Russia quickly started assembling its military and getting ready for battle. Germany, a strong ally of Austria-Hungary, responded by declaring war on Russia on August 1. Germany invaded Belgium a few days after declaring war on France. When Britain then declared war on Germany, World War I had officially started.
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