The document summarizes key details about World War 1: - It began in 1914 and ended in 1918, resulting in almost 8 million deaths and 22 million wounded. Russia suffered the most casualties with 1.7 million dead. - The main reasons for its start were extreme nationalism, imperialism, militarism, and the alliance system which could drag countries into conflict. - The assassination of Archduke Franz Ferdinand in Serbia by the Black Hand group, which aimed to create a Greater Serbia through violence, was the spark that ignited the war.