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American Power Tips the Balance
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American Mobilization
• Needed to build up armed forces
• Only 200,000 soldiers• Old weapons• 55 small planes• 130 pilots
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Mobilization
• Selective Service Act passed in May 1917
• 3 million drafted• 2 million reached
Europe
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Mobilization
• Women Served as nurses, secretaries and phone operators
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Mobilization
• Blacks served in segregated units
• Excluded from navy and marines
• Army trained black officers for the 1st time
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American Success in Combat
• Hard to get troops to Europe
• BY 1917-U-Boats had sunk twice as much ship tonnage as the Allies built
• U.S. began building more ships
• Draft reduced number of skilled ship builders– Exempted shipyard
workers from draft– Emphasized
importance of shipyard work
– Used fabrication– Converted civilian
ships to war ships
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Breaking the Blockade
• Convoy system
• Submarine chasers
• Airplanes
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A Submarine Chaser
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Breaking the Blockade
• U.S. helped lay underwater mines in the North Sea
• U-Boats no longer a threat by 1918
• U-Boats destroyed-hard to replace
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Fighting in Europe
• American troops were fresh
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Fighting in Europe
• John J. Pershing-General in charge of U.S. forces in Europe
• Aggressive
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The Tide Turns
• Russia out of War by 1918
• Germans now focusing on France
• 50 miles from Paris by May 1918
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The Tide Turns
• By October 1918, the tide had turned against the Central Powers due to American help
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Weapons of WWI
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Big Bertha
• Big Bertha
• German
• Could shoot a 1,800 pound shell 75 miles
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Zeppelins
• Gas filled air ship
• Enabled Germans to drop bombs on English cities
• Easy to shoot down
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Machine Guns
• 600 rounds/minute
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Poison Gas
• First used in 1915
• Gas masks became standard equipment
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Victim of Poison Gas
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Mechanized Warfare
• Warfare that relies on machines powered by gasoline or diesel engines
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Mechanized Warfare
• Tanks- built from steel• Bullets bounce off• First used by British in
1916-Battle of the Somme
• Airplanes- flimsy-limited to scouting at first
• Early gunfights resembled duels
• Eventually got faster and able to carry heavier bombs
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WWI Airplanes
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Medical Care
• Filth, lice, rats, polluted water
• Stench of gas and decaying bodies
• Suffered from lack of sleep
• Shell shock
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Collapse of Germany
• November 3, 1918-German Grand Fleet ordered to sea
• Sailors and marines refused
• Mutiny spread• November 9-People
of Berlin rebel
• Proclaimed a German Republic
• Kaiser abdicates• November 11, 1918
and 11AM-Fighting stops
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The numbers
• 30 nations involved• 26 million dead-half
civilians• 20 million wounded• Cost $350 billion