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Answer:</h2>
It had a major contribution by having immigrants go from their home country to the US for the money to move west thanks to the Gold and Silver in California.
<h3>
Explanation:</h3>
The reasoning why that is because in San Francisco in 1849 had the<u><em> major Gold Rush and they had Silver for almost 20 years worth of resources of that product.</em></u> The <u>San Francisco Gold Rush in California</u> to lead to migration to westward expansion and left with <u>boom towns</u>.
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Steaboats affected shipping becuase of how fast the shipping would but sometimes the steamboats would explode
He defeated many countries/ states or whatever and he let people stay there but when they would trade with other places the culture would spread and after attacking Alex would then spread that culture with them.
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Answer:
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Explanation: