Retell the event that triggered the First World War 1 student

The event that triggered the First World War was the assassination of Archduke Franz Ferdinand of Austria-Hungary. It happened on June 28, 1914, in Sarajevo, Bosnia. The Archduke was heir to the Austro-Hungarian throne, and his assassination set off a chain of events that led to the outbreak of the war.

The assassination was carried out by a group of Bosnian Serb nationalists called the Black Hand. They wanted Bosnia to be independent from Austria-Hungary and join Serbia instead. Gavrilo Princip, a member of the Black Hand, shot and killed the Archduke and his wife, Sophie. This act of violence was the spark that ignited the tensions between Austria-Hungary and Serbia, eventually leading to a full-blown conflict.

Austria-Hungary saw the assassination as a direct attack on their sovereignty and decided to take action against Serbia. They issued an ultimatum to Serbia, demanding an investigation into the assassination and the punishment of those responsible. However, Serbia did not fully comply with the demands, causing Austria-Hungary to declare war on Serbia on July 28, 1914.

The conflict quickly escalated as alliances came into play. Russia, an ally of Serbia, mobilized its troops to support Serbia against Austria-Hungary. Germany, in turn, declared war on Russia and its ally France. The domino effect continued as other countries joined the war, forming two opposing sides: the Allies (including France, Russia, and later Britain) and the Central Powers (including Germany, Austria-Hungary, and later the Ottoman Empire).

The assassination of Archduke Franz Ferdinand was the catalyst that set off a series of diplomatic and military actions, ultimately leading to the outbreak of the First World War. The war lasted for four years, resulting in millions of casualties and significant geopolitical changes in Europe