They felt surrounded, they couldn't do anything....
America increased the tariff of Cuban sugar, destroying the Cuban economy. This gave them momentum to gain independence from Spain, and gave the U.S. and easy chance to take good land for exports from Spain.
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Geologic Time, the extensive interval of time occupied by the geologic history of Earth. Scientists use relative dating to compare the age of two fossils by seeing how far they are down the layers of rock.
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