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Lesson 25 of 84 · World War 2
World War II: A Global Conflict
The Space Race led to remarkable achievements. The Soviet Union launched Sputnik in 1957. The U.S. landed astronauts on the Moon in 1969.
Key Facts
1
Timelines show events in order.
2
Cause and effect explain why things happen.
3
Oral histories preserve community stories.
Check Your Understanding
Question 1
1 of 2Which is a secondary source?