How Was the Assassination of Archduke Franz Ferdinand the Main Cause of World War 1?

How was the assassination of Archduke Franz Ferdinand the main cause of World War 1?
In this controlled assessment I will be discussing the main causes of world war one for example the assassination of Archduke Franz Ferdinand and exploring how this triggered the war. I will also be talking about other things such as; Militarism, Alliances, Nationalism, significant people and the two crises that took place in Morocco.
Firstly I will talk about the assassination of Archduke Franz Ferdinand he was 51 years old and was next in line to the Austro-Hungarian Empire. Franz Ferdinand was increasingly unpopular after he announced he wanted to make a lot of changes.   He was scheduled to visit Sarajevo the capital of Bosnia to inspect the Austro-Hungarian troops. It was planned to go ahead on the 28th June 1914. Archduke Franz Ferdinand planned that   he and his wife would travel to the city hall in a car with an open top roof. The Black Hand gang were a Serbian terrorist group which wanted to kill Archduke Franz Ferdinand were plotted along the route in which he would take as they thought that the inspection would be the best place to kill him.   The first member who was stationed along Franz Ferdinand’s route did not act; the second member chucked a bomb at him which the Archduke escaped from unharmed. After the 2nd terrorist tried to kill the Archduke he took Cyanide which didn’t work as it was out of date so he jumped into a river which was 4inches deep, he was caught. Archduke Franz Ferdinand’s driver took a wrong turn into a street where Gavrillo Princip was as he went to buy a sandwich. Gavrillo Princip saw Archduke Franz Ferdinand and seized his chance to kill him so he fired two shots. One of the bullets hit his pregnant wife Sophie in the stomach and the other hit him in the back of the neck. There both were killed.   Gavrillo Princip then tried to take his Cyanide but it again did not work, he was then caught before he could kill himself.   This was a crucial event...