I've learned this before I'll let you know the right answer when I get it.
Originally the United States only had atomic weapons, but that all changed when in 1949 the U.S.S.R (or the Soviet Union) set off an atomic bomb, which started the Nuclear Arms race.
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<span> Overcrowding created slums of dead and dying people, Was not an effect </span><span>of 19th century progress in the city of Manchester, England</span>
Answer:
The 1490's was a time of sailing, exploration, war, and trade. They competed for land, explored and invaded foreign lands, led conquests, and were victorious. This time was also full of powerful leaders, such as Hernando Cortés who led the expedition to mexico and Montezuma, who was the ruler of the Aztec Empire. The history of North America is very unique, it's a wide combination of European cultures and new American characteristics. North American's history began with the Vikings brief stint in 1000 A.D and continued through England's colonization of the Atlantic in the 17th century. This history laid the foundation of the United States of America. As more Europeans arrived, the Americas moved westward across the continent. During the expeditions, Americans were enticed by the lure of riches and opened land, and the desire to fulfill the nation's destiny.
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