Describe the Sarajevo incident of 1914.

What is referred to as the Sarajevo incident was the assassination of Archduke Franz Ferdinand of Austria and of his wife, Sophie, Duchess of Hohenburg. The assassination took place in Sarajevo on June 28th, 1914. This incident is known to have triggered World War I throughout Europe.
Sarajevo was the capital of Bosnia at the time that the Archduke Franz Ferdinand was visiting the city and was murdered there. Bosnia was part of the Austrian empire at the time of the Archduke's visit, but the people there wanted to form their own country and break off from Austria, for quite some time.
Eventually, Austria blamed Serbia for the murder of the Archduke because they provided weapons to a Bosnian gang of which a member (Gavrilo Princip) carried out the assassination. Serbia hoped to form an independent nation with the Bosnians ultimately.
While Austria could have easily invaded Serbia to quash a rebellion, they wouldn't have a strong enough base to fight Russia—Serbia's ally. Therefore, the Austrians called upon Germany for help. Germany got involved in the war as Austria's ally, believing itself to have a superior army to any other in Europe. The only caveat to this was not only having France or Russia as an enemy, but having them both as enemies and having to react to both armies rather than be on the offensive. At the time, they eventually had both of these countries as enemies. Germany attacked France through Belgium, pulling Belgium's ally Britain into the fray. Within a week of Austria claiming war against Serbia, all of these countries mentioned had become involved in the war, which later involved the United States also.