How the war started

-Zimmerman note-The Zimmermann Telegram was a 1917 diplomatic proposal from the German Empire for Mexico to join the Central Powers, in the event of the United States entering World War I on the side of the Entente Powers. It contributed to the war by making british scared because the central powers are getting stronger. 

-Sussex pledge- The Sussex pledge was a promise made in 1916 during World War I by Germany to the United States prior to the latter's entry into the war. If the germans broke this promise americans would half a reason to go to war.

-unrestricted sub warfare- Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules. This sparked the war because they started sinking american ships.

-Lusitania- a British luxury liner sunk by a German submarine in the North Atlantic on May 7, 1915:one of the events leading to U.S. entry into World War I. The spark of war was the assanation of The Ark Duke Of Francis. It brought new technology and it scared the germans.

The four M.A.I.N. causes of the war were

- militarism is the opinions or actions of people who believe that a country should use military methods, forces, etc., to gain power and to achieve its goals.

-alliances A close association of nations or other groups, formed to advance common interests or causes: an alliance of labor unions opposing the bill.

-Imperialism is a policy or practice by which a country increases its power by gaining control over other areas of the world.

-Nationalism is a feeling that people have of being loyal to and proud of their country often with the belief that it is better and more important than other countries.