Original sentence: They look at such factors as political, territorial and economic conflicts, militarism, a complex web of alliances and alignments, imperialism, the growth of nationalism, and the power vacuum created by the decline of the Ottoman Empire
Edited sentence: A Serbian terrorist shot him in attempt to get land that he thought should rightfully be Serbia's.After this, a chain  reaction occurred, bringing all the major powers into play.The immediate cause of this horrific war was the assasination of archduke Franz Ferdinand.They look at such factors as political, territorial and economic conflicts, militarism, a complex web of 2 major alliances (which we call the Allies and Central powers) and alignments, imperialism, the growth of nationalism, and the power vacuum created by the decline of the Ottoman Empire, or the acronym M(ilitarism)A(lliances)I(mperialism)N(ationalism)