Many people want to know what is the underlying cause of World War I apart from the Archduke’s murder. On June 28, 1914, the Archduke Franz Ferdinand, who was the heir to the Austrian throne, was assassinated by a Serbian, Austria-Hungary demand apologies from Serbia but they refused; on July 28, 1914, Austria-Hungary decides to declare war on Serbia. Russia decides to help Serbia because Serbia at the time was a Slavic nation. After Russia joined the war the allies of each country also start declaring war on each other. There are three underlying causes of World World I. One underlying cause of World War I was Imperialism. “The British Octopus” (Document E) is a German propaganda created in 1917, shows an octopus with tentacles moving around the map. The octopus supposes to be Britain taking natural resources from different nations in the world. On the map, it is also written: “Freiheit Der Meere” which means Freedom of the seas, Germany was worry about the freedom of the seas since England had the best navy in all Europe and there was a probability that they could take all control of the seas (Document E). Britain had the bigger total area of British colonies in 1913 (Document F). Countries with a large colonial population would help the country making the labor cheaper, having more markets and also having more soldiers to go to war. This evidence supports the claim that Imperialism was an underlying cause of the war because the lack of colonies of a country means that it will have less natural resources and it can also deteriorate the economy of it making nations go to war in order to get more colonies. A second underlying cause of World War I was militarism. Bernhard von Bülow says to the German Congress: “We’ll only be able to keep ourselves at the fore if we realize that there is no welfare for us without a strong army and a strong fleet” (Document D). The countries will have to improve their military force in order to be able to survive the war. The growth in Armaments shows that the expenditure in army and navy increased the most in 1914, Great Britain spent the most in their navy and Germany in their army (Document C). Great Britain spent the greatest percent on its navy because is an island so the only way to protect themselves it is by their navy and Germany spent in the army because it was worry about fighting France and Russia. This evidence supports the claim that militarism was an underlying cause of the war because the countries will compete with each other to see who is the best. While imperialism and militarism were important, the most basic underlying cause of World War I was the Alliance System. The European Alliances in 1914 were the Triple Alliance which was made up of Germany, Austria-Hungary, and Italy, the other alliance was the triple Entente made up of the United Kingdom, France, and Russia. (Document A). A country in an alliance was under attack by another country that also has an alliance, the nations of the alliances will fight each other. “The Crime of the Ages, Who Did It?” (Document B) is a cartoon created by John T. McCutcheon. The crime is that the “Peace of Europe” has been stabbed and there are eight soldiers representing each county involved in the war and they are blaming at each other for who kill the “Peace of Europe”. This evidence supports the claim that the Alliance System was an underlying cause of the war because without the alliances not many counties would have been involved.Although there were other causes that contributed to World War I like nationalism which was behind the assassination of Archduke Ferdinand, the three important underlying causes were imperialism, militarism, and the alliance system. But the alliance system is the primordial cause of the war because when the alliances were created the countries were involved in the war without having a problem with the country, this makes many countries to get into the World War I.