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Bloody Sunday. On the morning of Sunday 30 January 1972, around ten thousand people gathered in Londonderry for a civil rights march. The British Army had sealed off the original route so the march organisers led most of the demonstrators towards 'Free Derry Corner' in the nationalist Bogside area of the city.
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Geography, including regional differences in soils, rainfall, and growing seasons was the primary cause of economic differences among the colonies in North America. A result of the encounter between Europeans and Native Americans was that new diseases were spread to Native American populations.