In the early days of California railroading the Southern Pacific Railroad used iced reefers to ship fresh produce to the rest of the nation. In this way people in the rest of the country could enjoy the fresh produce that California farmers grew but was otherwise unavailable to people in much of the country.
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The transcontinental railroad connected the east and west coasts of the United States with a single rail line. This had a profound impact on the nation as a whole, and on California --- the end of the line. So the transcontinental railroad opened up the west for the country.
Railroad operations across the nation
chicago
Chicago!
The railroad united the nation.
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The capital of California is Sacramento. California is a state not a nation. It is part of the United States of America.
It tied the nation together.
It tied the nation together.
It tied the nation together.
It tied the nation together.