US History R1 – World War 1 starts

Thank you, Rose Marie, for getting the information for me to make this lesson!

This lesson explains the 4 MAIN reasons for why World War 1 started:

  • M — Militarism
  • A — Alliances
  • I — Imperialism
  • N — Nationalism

Wow, big words! The lesson explains them. 😅


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