What effect did the use of trenches and new technologies during World War I have?
During World War I, why was propaganda important for the war efforts?
The stalemate in the western front began after Germany failed to quickly defeat
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The graphic organizer shows the balance of power created by the alliance system in Europe prior to World War I.Which factor most affected the balance of power and led to the start of World War I?

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Why did governments sell war bonds?
Which statement describes an effect of poisonous gases used in combat during World War I?
Which factor made it most difficult for soldiers to cross the area between the trenches?
This poster appeared during World War I.

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