Explanation:
After the build up of tension from Nationalism, Imperialism and Militarism, the Powers were worried about being attacked by each other. To counter this alliances were formed. ... The Alliance System was definitely a prominent cause of WWI. If Germany hadn't allied with Austria the war might've been averted.
Answer:
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Theodore Roosevelt, Harry Truman, Andrew Jackson and so many other presidents didn't have a have president.
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