Why the U.S
Why the U.S. entered the
Trench The U.S.
Warfare In the war
In the war
Why the U.S.
entered the Treaty of
The Treaty of
The U.S. in
the war Lobby
Alliances- forming partnerships with
The Alliances contained
The central powers which included
Germany, Austria and the Ottoman
Empire (were Turkey is now.
The Allies which included Britain,
France, Russia and later the U.S.
Militarism-building up of the military
Military was built up for two reasons.
1) To protect their colonies
2) Peer pressure
-They used a military draft to accomplish
-Russia had the largest army ,Germany had
the best trained, Britain had the largest
Nationalism-pride in ones country
Nationalism in the WW 1 period
-The pan-German movement was the
hope to unite all German speaking
- The pan-Slavic movement was the
hope to unite all Slavic(Russian)
Example- In Bosnia 95% of people
spoke Slavic but it is controlled by
German speaking Austria.
Imperialism- competition for colonies
European nations were competing for
-They believed that “bigger was better.
Examples- Africa and Bosnia
To protect their positions and to cut
down on losses both sides dug
At night supplies were brought in and
scouts were sent out.
At dawn and dusk attacks would come
they would hit the enemy with artillery
and go over the top of the trenches.
The men had to go through barbwire,
machine gun fire and craters
Problems in the trenches included
mud, rats, smell, body rot, cold,
staying dry, maggots, lice and disease.
Why the U.S. entered WW 1
1. Sinking of the Lusitania
2. Unrestricted submarine warfare
3. Zimmerman's note
The Sussex pledge:
Germany promised not to sink any
merchant ships without warning them
first and rescuing the passengers.
By 1917 German is defeating Russia on
the eastern front they want a quick
victory on the western front.
-To do this they use Unrestricted
-They sink ALL ships headed toward
Zimmerman was a German official.
-He sent a letter to Mexico asking
them to attack the United States.
-In exchange he promised that
Germany would aid them in retrieving
some of the land that we took from
Sinking of the
The Lusitania was a passenger ship
that was secretly carrying ammunition.
-A German submarine sunk the ship.
-1,198 passengers died (128 were
-President Wilson demanded that the
Germans apologize and pay for the
The U.S. in the
General Pershing led the U.S. troops
-By 1917 Germany controller Belgium,
Italy and northern France.
-By 1918 Russia has had a revolution
and they have dropped out of the war.
-By July 1918, the United states has 1
million troops in the war.
-We cut off the German rail lines which
supply there troops.
-We attack through the Argonne
Forest. It takes 47 days and 1.2 million
soldiers. but we cut of there supply
-By October 1918, Germany’s lines are
-In November , the Allies have
captured the high ground and
Germany surrenders on the 11th hour,
the 11th day of the 11th month in 1918.
The war is then over.
The treaty that ended the war was the
Treaty of Versailles
The three main results were:
1. Created new colonies
-Russia: Poland, Finland, Latvia, Lithuania,
-Austria-Hungary: Austria, Hungary,
-Ottoman Empire; divided up between the
2. Punished Germany:
-They must take full responsibility for the war
and pay for the war(33 billion dollars)
3. Create the League of nations
-A organization of countries designed
to maintain peace and stability.
But it was the treaty was a reason for
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