The Sinking of the Lusitania and the Zimmerman Telegram
Central Powers and the Allied Powers
The killing of Archduke Ferdinand, the heir to the Austro-Hungarian throne was the spark that caused WW1 in Europe. Austria-Hungary was part of the Central Powers and Serbia was part of the Allied forces. Since a Serbian nationalist killed the archduke, the two sides started fighting.
New Technology and Trench Warfare
German U-boats sunk an American passenger ship named the Lusitania. A German man named Arthur Zimmerman sent a telegram to Mexico stating that they would help Mexico take back the land lost to America. Since the Zimmerman Telegram stated that Germany declared war on America, they joined the Allies in WWI before Mexico could receive the message.
The alliance system is when a group of countries that side with each other form an alliance, which makes them involved in each other's affairs. by America, Great Britain, France, and Russia were on the side of the Allied Powers. Germany and Austria-Hungary were part of the Central Powers.
The Treaty of Versailles
The conditions of trenches were horrible. They were very unsanitary and unsafe. Inside trenches, soldiers would usually get trench foot. New technology in WWI included the machine gun, which would quickly shoot down many enemy troops that went to cross no man's land. Airplanes were also new technology in WWI and were used for aerial warfare and to scout land.
The armistice happened on November 11, 1918 when Germany surrendered to the Allied Powers. The armistice happened because the Allies were able to advance during the Battle of the Argonne Forest, making the Germans surrender. The armistice forced Germany to get rid of its U-boats, cancel the Treaty of Brest-Litovsk, make the German monarch step down, give up land, and pay war reparations.
Germany was punished for the war by taking away their U-boats, making their monarch step down, canceling the Treaty of Brest-Litovsk, and pulling its troops from the Western Front. President Wilson created his Fourteen Points plan. The first five points dealt with issues that led to war. Points 6 - 13 dealt with territorial problems that happened because of war. The League of Nations was created to guarantee world peace and was the fourteenth, and President Wilson's most important point.