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| 13060584020 | The assassination of Archduke Franz Ferdinand | This was the spark that started World War I. Archduke Ferdinand, the Austrian crown prince, was murdered on June 28, 1914, by a Serbian nationalist while visiting Sarajevo, Bosnia. Germany urged Austria-Hungary to fight and they went to war against Serbia; all of this due to Serbia wanting to expand |  | 0 |
| 13060584021 | Woodrow Wilson | This was the president who was elected in 1912, and led the US into WWI. Later wrote a plan for post-WWI peace known as the Fourteen Points. |  | 1 |
| 13060584022 | Austria-Hungary | This Central Power empire during WWI, started the war with their invasion of Serbia after the assassination of Archduke Ferdinand on June 28, 1914 . It was made up of Austria, Hungary and several other nations and territories. After World War I it split up into several nations. |  | 2 |
| 13060584023 | U-boats | This new machinery used by the Germans in sea warfare, to attack British and American supply ships in the North Sea and the Atlantic Ocean. |  | 3 |
| 13060584024 | Nationalism | This cause of World War I was based on an intense pride in one's nation. |  | 4 |
| 13060584025 | Allied Powers | This alliance during WWI included the United States, Great Britain, France, Russia and Italy (switched to the Allied Powers in 1915). (The blue countries of the East and West on map above) |  | 5 |
| 13060584026 | Wilson's Fourteen Points | This is the plan for post-World War I outlined by President Wilson in 1918. This plan called for self-determination (countries in Africa and Asia govern themselves), freedom of the seas, free trade, end to secret agreements, reduction of arms and a league of nations. |  | 6 |
| 13060584027 | Zimmerman Telegram | This intercepted note from the German foreign minister to the Mexican government offered, territories in Texas, Arizona and New Mexico for Mexico. The note also confirmed the new policy of unrestricted submarine warfare by Germany against the Allied Powers. This helped turn Americans against Germany in WWI. |  | 7 |
| 13060584028 | Lusitania | This British passenger ship was sunk by German U-boats in 1915, carrying civilians and ammunition to Britain from the U.S. The event turned American opinion against Germany. |  | 8 |
| 13060584029 | Trench Warfare | This style of warfare was common in WWI, due to the invention of the machine gun and heavy artillery. It included digging long trenches, separated by barbed wire and a no mans land. |  | 9 |
| 13060584030 | Armistice, 1918 | This was the agreement between the Allies and Central Powers that ended the fighting after WWI. It began at 11/11/1918 at 11:11 am. This marked a victory for the Allies and stated that the Central Powers lost. Germans would later look at this as "the stab in the back." |  | 10 |
| 13060584031 | Reparations | This term refers to the payments and transfers of property that Germany was required to make under the treaty of Versailles. |  | 11 |
| 13060584032 | League of Nations | This intergovernmental organization lasted from 1919-1946, was founded after the Paris Peace Conference. It did not work effectively to prevent WWII. |  | 12 |
| 13060584033 | Imperialism | This cause of World War II resulted from the competition among European nations for colonies in Africa and Asia from 1880-1914. This created tension, especially between Germany and Great Britain. |  | 13 |
| 13060584034 | Alliances | This was a major cause of WWI. Two major alliances formed the Triple Alliance (Germany, Austria, Italy) and the Triple Entente (France, England, Russia). This alliance system made world war likely, by drawing all countries into a small war. |  | 14 |
| 13060584035 | Triple Alliance | This alliance was made Germany, Austria-Hungary and Italy in the years before WWI. IN RED ABOVE |  | 15 |
| 13060584036 | Triple Entente | This alliance between Great Britain, France and Russia in the years before WWI. IN BLUE ABOVE | | 16 |
| 13060584037 | Central Powers | This was a major alliance at the 'center' of Europe during World War I, made up of Germany, Austria-Hungary, Bulgaria, and Ottoman Empire. It was formerly known as the Triple Alliance before the war. SHOWN ABOVE IN RED. | | 17 |
| 13060584038 | Allied Powers | This was a major alliance during World War I made up of Britain, France, Russia, and the United States. It was know n as the Triple Entente(a French word) before the war. | | 18 |
| 13060584039 | Unrestricted Submarine Warfare | A policy that the Germans announced on January 1917 which stated that their submarines would sink any ship in the British waters. Resulted in entry of the US into World War I. | 19 | |
| 13060584040 | Militarism | This cause of World War I was a policy of building up strong armed forces to prepare for war. | 20 | |
| 13060584041 | Treaty of Versailles | Treaty which ended World War I that included large reparations from Germany, the formation of the League of Nations, and the mandate system. |  | 21 |
