<span>artifacts found at historical sites
letters written during that period in history
documents with information about the past</span><span>
</span>
The major physical feature that the pioneers crossing West had to contend with were the Rocky and Sierra Nevada Mountains.
These mountain ranges were treacherous and many died trying to find passages to cross.
A lack of railroads affected a lot of things. For example like getting supplies or not having job opportunities due to not having a railroad. Also without have a railroad it made traveling harder.
Railroads brought crops and food to cities in the East, and settlers to farms in the Great Plains
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