The document provides background information on the causes of World War I, including militarism, alliances, nationalism, imperialism, and the assassination of Archduke Franz Ferdinand. It discusses the rise of pan-Slavism and pan-Germanism in the Balkans. Key events that increased tensions are outlined, such as the Moroccan Crisis, Balkan Wars, and the assassination of Franz Ferdinand. Austria-Hungary declared war on Serbia in response to the assassination, pulling the allied countries of Germany, Russia, France and eventually Britain into the war. Trench warfare ensued as a new strategy, trapping armies in a bloody stalemate on the Western Front for four years.