1. Chapter 21 Aim: to identify the causes of WWI Do now: How can expanding your empire lead to war?

2. Chapter 21 Section 1 Origins of WWI  1914 tensions in Europe erupted into war  America was a world power but tried to keep out of war in Europe

3. Chapter 21 Section 1 Militarism  Imperialism leads to rise in militarism = glorification of the military  Military leaders gain political support

4. Chapter 21 Section 1 Alliance Systems  With tensions, alliances formed  Germany aligned with Austria-Hungary  Britain and Russia pledged to come to one another's aid if attacked

5. Chapter 21 Section 1 Imperialism  Imperialism = building empires by imposing outside rule over peoples around the rule.  European nations competed for trade and territory

6. Chapter 21 Section 1 Nationalism  Different groups sought to break free from the nations that captured them  Nationalism = pride in ones country

7. Chapter 20: Section 1

8. Chapter 21 Aim: to identify the start of WWI Do now: What are the main causes that lead to WWI?

9. Chapter 21 Section 1 War Begins  June 28, 1914 Franz Ferdinand assassinated by Serbian national  July 29, 1914 Austria- Hungary declared war on Serbia  Alliance system drew more than 20 countries into war

10. Chapter 21 Section 1 War Begins  Allies = Britain, France and Russia  Central Powers = Germany, Austria- Hungary and Ottoman Empire

11. Chapter 21 Section 1 Deadliest War  Both sides hoped for quick victory  Stalemate = deadlock or standstill, lasted 3 years  Western Europe, soldiers use Trench Warfare = soldiers fire on one another from opposing lines of dug out trenches

12. Chapter 21 Section 1 Deadliest War  Technological advances make war more lethal  Scouting planes, armored tanks and rapid fire machine guns raised the death toll  Poison gas most feared, used by both sides

13. Chapter 20: Section 1

14. Chapter 21 Aim: to explore how the U.S. enters WWI Do now: What single event led to the start of WWI?

15. Chapter 21 Section 1 American Neutrality  President Woodrow Wilson sought to keep U.S. out of war  Americans divided between who they supported  Britain used propaganda to win over the Americans Propaganda= spread of information designed to win support for a cause.

18. Fight for Freedom

19. War bonds, help the guardians of your happiness

20. Chapter 21 Section 1 Supplying the Allies  Legally, American firms were free to sell to both sides  Most American trade was with the Allies  Britain blockaded supplies to Germany

21. Chapter 21 Section 1 The Lusitania  Germans had large supply of U-Boats  May 7, 1915 a U-Boat sank a British passenger ship call the Lusitania  128 of the 1,200 people that died were Americans

23. Chapter 21 Section 1 Entering the War  Wilson was reelected on the slogan “He kept us out of war”  He called on the warring nations for peace  A German note to Mexico known as The Zimmermann Telegram was intercepted by the British in 1917

24. Chapter 21 Section 1 Entering the War  The telegram proposed that Mexico join the war, in turn, Germany would help them “reconquer” New Mexico, Texas and Arizona  The Zimmerman Telegram was released to the press, angering all Americans

26. Chapter 21 Section 1 Declaring War  On April 2, 1917 Wilson asked Congress to declare war against the Central Powers  After nearly three years, the United States was at war

27. Chapter 20: Section 1