How many men did it take to kill the Archduke Franz Ferdinand?

It took a group of seven conspirators from the nationalist group known as the Black Hand to orchestrate the assassination of Archduke Franz Ferdinand. However, only one man, Gavrilo Princip, ultimately carried out the act on June 28, 1914, when he shot the Archduke and his wife, Sophie, in Sarajevo. The assassination is widely regarded as a catalyst for the outbreak of World War I.