After the assassination of Archduke Ferdinand in 1914, how did Austria-Hungary respond? (What did they want to do to Serbia?) From which country did they find support?

Explanation:

Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo on June 28, 1914. The killings sparked a chain of events that led to the outbreak of World War I by early August. On June 28, 1919, five years to the day after Franz Ferdinand’s death, Germany and the Allied Powers signed the Treaty of Versailles, officially marking the end of World War I.Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo on June 28, 1914. The killings sparked a chain of events that led to the outbreak of World War I by early August. On June 28, 1919, five years to the day after Franz Ferdinand’s death, Germany and the Allied Powers signed the Treaty of Versailles, officially marking the end of World War I.The archduke traveled to Sarajevo in June 1914 to inspect the imperial armed forces in Bosnia and Herzegovina, annexed by Austria-Hungary in 1908. The annexation had angered Serbian nationalists, who believed the territories should be part of Serbia. A group of young nationalists hatched a plot to kill the archduke during his visit to Sarajevo, and after some missteps, 19-year-old Gavrilo Princip was able to shoot the royal couple at point-blank range, while they traveled in their official procession, killing both almost instantly.The assassination set off a rapid chain of events, as Austria-Hungary immediately blamed the Serbian government for the attack. As large and powerful Russia supported Serbia, Austria asked for assurances that Germany would step in on its side against Russia and its allies, including France and possibly Great Britain. On July 28, Austria-Hungary declared war on Serbia, and the fragile peace between Europe’s great powers collapsed, beginning the devastating conflict now known as the First World War.