Course of WWI
short war illusion Schlieffen Plan: avoid 2-front war western front vs. eastern front trench warfare = stalemate
Why did the US enter the war in 1917? Germany’s unrestricted submarine
warfare 1915: sinking of Lusitania 1915-1917: halted 1917: resumed
Zimmermann Telegram Germany offered Mexico US territory if they
joined the German cause
Why was WWI so destructive? trench warfare new technologies:
tank poison gas machine gun airplane submarine
Tank
A German tank.
1916: tank warfare introduced by France/GB
1917: France & GB used 1500 tanks each
Poison Gas
German soldiers wearing gas masks.
The Germans introduced the use of poison gas in warfare in 1915.
Airplane
Above: Painting of a British airplane engaged in combat. The airplane has a machine gun mounted on its top wing.
Below: A German airplane.
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