During the early stages of World War I many African American sharecroppers in Georgia left the South and moved to cities in the North (this was the Great Migration) in search of better jobs and opportunities.
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i go with a cultural characteristics can be used to define regions
The Truman Doctrine definitely represents the policy of containment. Containment is the idea that America wants to stop the spread of communism to other nations. America is fearful that if they fail to stop communism from spreading to one country, that it will lead to several countries becoming communist (known as the domino effect).
In order to stop the spread of communism, the US government tries to give financial assistance to countries that are susceptible to falling under Soviet control. Two of these countries in particular are Turkey and Greece (due to their geographical location near the Soviet Union). This is why President Harry Truman proposes $400 million worth of aid to these countries, so that they may stabilize their economy and become allies with the United States. This shows containment, as without these funds the countries could have very well been taken over by the Soviet Union and the system of communism.
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Compass: Allowed sailors and navigators to find direction.
Gunpowder: Allowed us to make modern day weapons, such as guns.
Paper: Allowed us to write on a thing that can be mass produced and is efficient to use.
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