Assassination of Archduke Franz Ferdinand

In 1913, Emperor Franz Joseph commanded Archduke Franz Ferdinand, heir presumptive to the Austro-Hungarian throne, to visit the military exercises in Bosnia in June of 1914. Franz Ferdinand and his wife, Sophie, Duchess of Hohenberg were assassinated on 28 June 1914 in Sarajevo by Gavrilo Princip. Princip was one of a group of six assassins (one Bosniak and five Serbs) coordinated by Danilo Ilić, a Bosnian Serb and a member of the Black Hand secret society.
The purpose of assassination was to break off Austria-Hungary’s South Slav provinces so that they can be combined into Yugoslavia.
The assassination led directly to World War I. Austria-Hungary issued an ultimatum to the Kingdom of Serbia after it happened. However, a part of them was rejected by Serbia since Russia promised military support for Serbia. Then, Austria-Hungary declared war on Serbia because Germany promised military support.
Under the Secret Treaty of 1892, Russia and France were obliged to mobilize their armies if any of the Triple Alliance mobilized. Russia ordered general mobilization. With the Russia's general mobilization, Austria-Hungary and Germany also Austro-Hungarian and German mobilizations. Soon all the Great Powers mobilize their armies and gone to war. As the assassination of Franz and Sophia was the trigger of starting World War I, it is important historically especially for European countries.

Letter to university friend - after reading

Dear Anna,

I hope that you are doing fine. It's been awhile to write a letter to you because I was in a blindness and was losing my mind. I have been a sniper for a team since this war occurred. I was thinking it was right decision, but some things happened to me lately and I realized that I was wrong.

One of things that happened to me is that a man was truly trusted from the bottom of my heart was killed by the top of my team. I thought I was choosing what I want to do, but it was wrong. He was protecting me from the top of team. The top of my team is cold and demanding. Now, they want me to kill someone, which I don’t want to do that.

Another thing which changed my thought is a cellist. He started to play cello after bombing at bakery. 22 people died for the bombing, and the cellist plays cello for 22 days. One day, I heard his play, and realized there are too many hates in this town. No one of my enemies or me doesn’t have to be a killer. I’m regretful to be a sniper very much.

Now, people of my team are chasing me because I didn’t obey them. Maybe, they will kill me. I hope I can survive and meet you again. I want to hang around with you after this war is over someday.

Your friend,

Alisa