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Which landmark on the map was a major obstacle before the wagon trains And rail roads of The west ward Expansion

Which landmark on the map was a major obstacle before the wagon trains And rail roads-example-1
User Drinkmystery
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2 Answers

16 votes
16 votes
The Sierra Nevada mountain
User James Roper
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21 votes
21 votes

The Sierra Nevada Mountains. :)

User Dbrin
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