Answer:
Steam-powered trains.
Explanation: Railroads provided the most dramatic transportation growth during the 1800s. They facilitated the movement of people, goods, and information, decreased shipping costs and time, and strengthened the links between the Old Northwest and the East.
Angel island was on the west coast
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Southerners were afraid that if they admitted California as a free state, when it came to vote on things like the Wilmot proviso, free states would have majority rule.
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The capital city of the Eastern Roman Empire (aka Byzantine Empire) was called Constantinople. The city was named after the Emperor Constantine of the Roman Empire.<span />