U.S. IISOL
5c USII.4c
Turmoil and Change
Previous Unit
Imperialism
World War I
Next Unit
1920s/1930s
is about
the reasons the United States became involved in World War I and its leadership role at the war’s end
I. Reasons for United States
Involvement in World War I
(USII.5c)
Inability to remain neutral
 German submarine warfare:
Sinking of the Lusitania
 United States economic and
political ties to Great Britain
 The Zimmermann Telegram
II. Major Allied Powers and
Central Powers (USII.5c)
III. United States Leadership as the
War Ended (USII.5c)
Major Allied Powers
 British Empire
 France
 Russia
 Serbia
 Belgium
 United States
Central Powers
 German Empire
 Austro-Hungarian Empire
 Bulgaria
 Ottoman Empire
 At the end of World War I,
President Woodrow Wilson
prepared a peace plan known as the
Fourteen Points that called for the
formation of the League of Nations,
a peacekeeping organization
 The United States decided not to
join the League of Nations because
the United States Senate failed to
ratify the Treaty of Versailles
ESSENTIAL QUESTIONS:
1. What were the reasons for the United States’ becoming involved in
World War I?
2. Who were the Allies?
3. Who were the Central Powers?
4. In what ways did the United States provide international leadership
at the conclusion of the war?
1
VOCABULARY:
Allied Powers
alliance system
Lusitania
League of Nations
Central Powers
isolationism
Zimmermann Telegram
Treaty of Versailles
U.S. II 5c
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U.S. II 5c
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