History and World war 1

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Subject
Level
Highschool
Grade
11
When did world war 1 begin
Subject
Level
Highschool
Grade
10
Explain how the system of alliances that was formed in Europe before World War 1 caused most European nations to be drawn into conflict
Subject
Level
Highschool
Grade
9
new weapons such as what made trench warfare unbearable?
Subject
Level
Highschool
Grade
11

Why did the Japanese attack pearl harbor 

Subject
Level
Highschool
Grade
9
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