1) World War 1 began due to a series of interlocking military alliances between European powers and their colonies. Germany invaded Belgium to reach France as outlined in the Schlieffen Plan. 2) The war led to brutal trench warfare with neither side able to gain a decisive advantage on the Western Front. It also involved fighting on the Eastern Front between Germany and Austria-Hungary against Russia. 3) The US entered the war in 1917 on the side of the Allies after German submarine warfare threatened American merchant shipping and the interception of the Zimmerman Telegram proposing a German-Mexican alliance against the US.

1. 2 War
TERMS & NAMES
Overview • Schlieffen Plan
• Central Powers
WHY IT MATTERS NOW • Allies
Much of the technology of • Western Front
modern warfare, such as
• trench warfare
fighter planes and tanks,
was introduced in World War • Eastern Front
I.

2. The Schlieffen Plan

3. The Schlieffen
Plan

4. Belgium
was neutral,
but
Germany
invaded it to
get to
France.

5. Trench Warfare
--- fighting from a
hole in the
ground

6. trench warfare aerial view

7. trench warfare --- not really

8. Christmas truce 1914

9. Eastern front

10. U-boat

11. Lusitania

12. US patience cartoon

13. Lusitania cartoons

14. Zimmerman promise

15. Zimmerman encoded

16. "We intend to begin on the first of February unrestricted
submarine warfare. We shall endeavor in spite of this to keep
the United States of America neutral. In the event of this not
succeeding, we make Mexico a proposal or alliance on the
following basis: make war together, make peace together,
generous financial support and an understanding on our part
that Mexico is to reconquer the lost territory in Texas, New
Mexico, and Arizona.
The settlement in detail is left to you. You will inform the
President of the above most secretly as soon as the outbreak of
war with the United States of America is certain and add the
suggestion that he should, on his own initiative, invite Japan to
immediate adherence and at the same time mediate between
Japan and ourselves. Please call the President's attention to the
fact that the ruthless employment of our submarines now
offers the prospect of compelling England in a few months to
make peace.”
Signed, ZIMMERMANN.

17. Pancho Villa’s men

18. Mexican Revolution
• 1910-1917
• Against dictatorship
• Promoting democracy
• Rebel Emiliano Zapata

19. Lusitania propaganda

20. supreme
command

21. red Baron
The Red Baron

22. snoopy

23. Spanish Flu

24. influenza collage

25. influenza chart

26. women in France

27. 2 War
1. Look at the graphic to help organize your
thoughts. Write the immediate reason why each
nation listed below declared war on the other
nation listed.
War Declaration Reason for Declaration
Germany on Russia Saw Russia’s troops along German border as threat
Germany on France Wanted a quick victory in the west
Britain on Germany Outraged over violation of Belgian neutrality

28. 2 War
1. Look at the graphic to help organize your thoughts.
List the reasons why the United States entered World
War I.
Reasons for United States Entry
1. Germans sink Lusitania, a British ship carrying some American passengers.
2. Germany returns to unrestricted submarine warfare, sinking U.S. ships.
3. Zimmermann note decoded—German note urging Mexico to take up arms against U.S.
4. Strong feelings of sympathy for the Allies

29. Part 3: Effects of War
• Your goal:
Understand how World War I affected the
world.

30. 3 Effects of War
2. In what ways was World War I truly a global
conflict?
• where
THINK ABOUT the war was fought
• who participated in the war effort
ANSWER
Possible The war was fought in numerous places outside
Response: Europe: Africa, Southwest Asia, China, and the
Pacific. People from many nations participated in
the war effort, including colonial subjects
throughout Africa and Asia.

31. 3 Effects of War
Section 3 Assessment
3. How did the concept of total war affect the
warring nations’ economies? THINK ABOUT
• the governments’ new role in their
economies
• the scarcity of food and other products
• the role of women
• unemployment rates during the war years
ANSWER
Possible • Governments took greater control of economies,
Responses: telling factories what and how much to produce.
• Civilian factories were turned into munitions
factories.
• Rationing was common.
• Women became a significant part of the work