Who is assassination led directly to World War 1?

The assassination that directly led to World War I was that of Archduke Franz Ferdinand of Austria. He was killed on June 28, 1914, in Sarajevo by Gavrilo Princip, a member of the nationalist group known as the Black Hand. This event triggered a series of diplomatic crises and alliances, ultimately resulting in the outbreak of the war in July 1914. The assassination escalated existing tensions in Europe, particularly between Austria-Hungary and Serbia, leading to a global conflict.