Answer:
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Explanation:
Two examples of how changes to the railroad system helped American Industries to grow is first the expansion West.
When the railroad was made, it made the Western Coast much more important, as both sides were linked with a reliable way of transportation. As a result of this, Industries from both coasts benefited as you could manufacture some parts in California and bring it to Georgia to make a product.
Another example of how the change benefited industries is how it made commerce avaliable large scale. The benefits of this also helped both coasts of the USA.
The main factor that led to the development of the four major river valley civilizations was its closeness to rivers, which was a food source, its flooding allowed for fertile soil, allowed easy transportation and cities near them were easier to defend.
The fact that fewer people had to dedicate to the production of food allowed some of them to develop other activities, such as the construction of building and cities, metal working, trade and social organization. This led to a social division, the ones that worked and the ones that ruled, creating intricate systems of governments and religions that ideologically sustained those in power.
Answer:
When Lincoln was elected, America kept on adding more states, some were slave states, other were free. They balance of free and slave states kept changing, which made people angry, especially in Congress. When Lincoln came into power, everyone was scared that he would abolish slavery for good, and add more free states to the union, so congress would be able to abolish slavery, therefore leading to the Civil War.
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Before becoming President of the United States, Theodore Roosevelt was the Assistant Secretary of the Navy. He resigned in 1898 to organize the Rough Riders, the first voluntary cavalry in the Spanish-American
