Final answer:
The group that assassinated the man in Sarajevo during an event that sparked the beginning of World War I was The Black Hand.
Step-by-step explanation:
The group that assassinated the man in Sarajevo during an event that sparked the beginning of World War I was known as The Black Hand.
The Black Hand was a Serbian nationalist organization that aimed to separate Bosnia-Herzegovina from Austria-Hungary and annex it to Serbia, forming Greater Serbia. On June 28, 1914, one of the members of The Black Hand, Gavrilo Princip, shot and killed Archduke Franz Ferdinand and his wife Sophie.
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