Question

How did Serbia angered austria-hungary?

Answer 1

Hint: At six o'clock in the evening of 23 July 1914, almost one month after the assassination in Sarajevo, Bosnia, of the Austrian Archduke Franz Ferdinand and his wife by a young Serbian nationalist, Baron Giesl von Gieslingen, Ambassador to Serbia of the Austro-Hungarian Empire, delivers an ultimatum to the Ministry of Foreign Affairs of Serbia.

Complete answer:
Bosnia-Herzegovina was then under the jurisdiction of Austria-Hungary. The Black Hand, a group of Serbs, decided to liberate Bosnia and Herzegovina because 80 percent of the people of Bosnia and Herzegovina were Serbs.
The mixture of Serbia and Bosnia and Herzegovina was planned by the Black Hand to create a Greater Serbia. So, while he was in Serbia, the Black Hand intended to kill the Archduke.
The assassin who killed the Archduke was Gavrilo Princip, a member of the Black Hand (other assassins failed). The archduke and his wife were shot dead by a gunshot.

Threatened by Serbia's aspirations in the turbulent Balkans area of Europe, Austria-Hungary agreed that planning for a potential military invasion of Serbia was the best response to the assassinations. On July 23, 1914, Austria-Hungary presented Serbia with a strict ultimatum after gaining the unconditional support of its strong ally, Germany, demanding, among other things, that all anti-Austrian propaganda within Serbia be suppressed.

Later austria-hungary with the support of their ally germany declared war on serbia resulting in world war 1

Note: Germany, Austria-Hungary and the Ottoman Empire were pitted against Great Britain, the United States, France, Russia, Italy and Japan in World War I. Unprecedented carnage has resulted from modern military technologies. More than 16 million people, troops and civilians alike, were dead by the time the war ended and the Allied Powers declared victory.