1. Reasons for the United States’ entry into WWI

2. 1.Isolationism A policy of avoiding foreign alliances A policy of avoiding foreign alliances The U.S. had no interest getting involved in a European War, so the U.S. avoided making any alliances with a country. The U.S. government wanted neutrality, the policy of not choosing sides in a war, but wanted to continue to TRADE with all countries of The Allies and Central Powers

3. 2. Submarine Warfare Sinking of the Lusitania The German U-Boats sunk American trade ships. When the Germans sunk the Lusitania, it killed 128 Americans. The Sussex sinking injures Americans, leading to a pledge by Germany to end submarine warfare.

4. 3. The Zimmerman Note A telegram from the German Ambassador to Mexico asking them to fight the Americans A telegram from the German Ambassador to Mexico asking them to fight the Americans In this note, the U.S. government intercepted a letter from Germany stating if Mexico joined the Central Powers, and the U.S. joined the Allies, then Germany would help Mexico gain the land lost in the Mexican-American War.

5. President Wilson asks Congress to Declare war on Germany April 1917 He stated that Germany could never be an ally and Americans should go to war to protect their own freedom and freedom of smaller nations. Remember, only Congress can declare war.

6. Mobilizing for the War In April 1917, the U.S. had only 200,000 men in the military and little equipment to give them. In April 1917, the U.S. had only 200,000 men in the military and little equipment to give them. The Selective Service Act was passed in May. This required all men between the ages of 21 & 30 register for the draft, which is required military service. The Selective Service Act was passed in May. This required all men between the ages of 21 & 30 register for the draft, which is required military service. By June, 10 million registered for the draft and about 3 million men were drafted. By June, 10 million registered for the draft and about 3 million men were drafted.

7. Selective Service Act

8. What is mobilization? Mobilization means getting other people involved. Mobilization means getting other people involved. This man could have gone out alone to rescue one or two drowning men. Instead he is alerting (mobilizing) others to become part of his rescue force. This man could have gone out alone to rescue one or two drowning men. Instead he is alerting (mobilizing) others to become part of his rescue force.

9. Russian Revolution Communism takes over Russia with the murder of the Russian czar and his family. Communism takes over Russia with the murder of the Russian czar and his family. Russia now signs a peace treaty with Germany Russia now signs a peace treaty with Germany Allied forces force Germany to retreat and end the war Allied forces force Germany to retreat and end the war

10. Fourteen Points President Wilson’s suggestions for world peace President Wilson’s suggestions for world peace No more secret alliances No more secret alliances A reduction in armaments (war materials) A reduction in armaments (war materials) Freedom of the seas Freedom of the seas A fair settlement of the disputes over colonies A fair settlement of the disputes over colonies Removal of economic barriers among nations Removal of economic barriers among nations A world organization that would provide a system of security for all nations = League of Nations A world organization that would provide a system of security for all nations = League of Nations

11. Treaty of Versailles Treaty that ended World War I Treaty that ended World War I The rulers of the 4 main allies, France, Britain, Italy and the U.S., dominate the conference. They’re known as the “Big Four” The rulers of the 4 main allies, France, Britain, Italy and the U.S., dominate the conference. They’re known as the “Big Four” Pres. Wilson wanted peace, but the others wanted revenge = territory; land Pres. Wilson wanted peace, but the others wanted revenge = territory; land The League of Nations is created The League of Nations is created

12. Treaty of Versailles Germany must do the following: Germany must do the following: 1. Take full blame for the war 2. Surrender territory to surrounding nations 3. Give up its colonies 4. Reduce the size of its military 5. Pay reparations for the war. Reparations are payments made for war expenses and damages

13. European Map before World War I

14. European map after WWI

15. Consequences and Effects of WWI

16. Political Germany, Austria-Hungary, and the Ottoman Empire gave up parts of their land. Much of Eastern Germany will become the nation of POLAND. Germany, Austria-Hungary, and the Ottoman Empire gave up parts of their land. Much of Eastern Germany will become the nation of POLAND. The Austro-Hungarian Empire disappeared. The empire was made into the countries of Austria, Hungary, Czechoslovakia, and Serbia The Austro-Hungarian Empire disappeared. The empire was made into the countries of Austria, Hungary, Czechoslovakia, and Serbia

17. Economic Remember that The Treaty of Versailles stated that Germany had to pay for the war? The Germans couldn’t pay at once, only in installments. Remember that The Treaty of Versailles stated that Germany had to pay for the war? The Germans couldn’t pay at once, only in installments.

18. Social The war reparations (payments) Germany was forced to pay embarrassed, HUMILIATED the German people. The war reparations (payments) Germany was forced to pay embarrassed, HUMILIATED the German people. When German dictator Adolf Hitler rises to power, he uses this bitterness to begin WWII. When German dictator Adolf Hitler rises to power, he uses this bitterness to begin WWII. Question: What country does Germany invade to begin WWII? Answer: Poland

19. After the war in the U.S. Red Scare- fear that a communist revolution would come to America. Red Scare- fear that a communist revolution would come to America. In communism, the workers own the factories. Everyone has a job regardless of job performance, and everyone gets paid what they need to live. This way, there is no reason to work hard. In communism, the workers own the factories. Everyone has a job regardless of job performance, and everyone gets paid what they need to live. This way, there is no reason to work hard.

20. Palmer Raids- arrests of immigrants, mostly Russians, in 1919 who were suspected of being communists. They were accused of a series of bombings across the U.S. Palmer Raids- arrests of immigrants, mostly Russians, in 1919 who were suspected of being communists. They were accused of a series of bombings across the U.S.