The World War I was marked by not only the twentieth century but its consequences in many ways still felt today. After years of unspeakable progress, technology development, artistic experiments and everything that marked the fin de siècle, the war began. Unexpectedly by many, until then it became the bloodiest conflict in human history, the first global war that changed the political map of the world in which tens of millions of people were killed. That is an unprecedented way changed the ways of war. The World War I is one of the most important events in human history. Often in the shadow of the World War II, this conflict is marked by history more than any other conflict before it.