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Q: How did America develop from a British colony into a country with a vast land?
In 1771, George Washington succefully led the army with the support of France drove away most British colonists and founded the United States of America, which lays the foundation for the development of America later.At that time, American territory was about 800,000 square kilometers along the coast of the Atlantic.In 1783, Britain recognized the independence of America, and had the most of the other land along the Atlantic to America.The territory area was up to 23,000,000 square kilometers, accounting for about 30% of the local area of America now.In 1789, the federal government established.The newly-established USA soon embarked on the road of territorial expansion.Despite war, money became the most common way to acquire territory.In 1800, French president Napoleon captured the Louisiana area from Spain.In 1802, the American president, Jefferson bought this large tract of land from napoleon.In 1808, Spain was occupied by Napoleon.Taking this advantage of this opportunity, a large number of Americans moved to Florida.In 1819, American spent $500,000,000 getting the15 square kilometers of Florida.The expansion of Louisiana and Florida made America taste the sweetne, then, America succeively got the Texas and Oregon areas from Mexico and British through counterespionage and threatening way, which made the territory extend to the Pacific coast from the Atlantic coast.At that point, California awoke its interest.In 1841, American immigrated to California in succeion.After the request was refused that America attempted to buy California, America decided to meet the desire of getting this land by force.In May, 1846, America officially declared war on Mexico.Due to the lack of training and equipment, the Mexico army quickly defeated and California belonged to America naturally.In February 2, 1848, America got nearly 1,400,000 square kilometers of land including California and New Mexico area.In 1853, USA paid $ 1,000,000 for the U.S.-Mexico border of nearly 100,000 square kilometers of land.Originally, Alaska belonged to Ruia.However, after the Crimea War in 1856, Ruia was badly hurt, and decided to sell this land to America.In 1867, the United States purchased Alaska from Ruia for $7.2million.At the end of nineteenth century， America got some Pacific islands such as Hawaii through war and many other ways.
