美国领土扩张----Territorial-Expansion-of-America

1853，on the pretext of southern railway construction, the U.S.
bought the Sheila river basin of southern Arizona .(以亚利桑那州南 部希拉河流域) 1876， the U.S. bought Alaska and Aleutian islands from Russia.(阿 拉斯加和阿留申群岛)
这片辽阔的土地，超过了法、德两国面积总和， 包括了今天的加里福尼亚，内华达、亚利桑那、 新墨西哥四州以及科罗拉多和怀俄明州的一部 分。
1846～1848，on the pretext of boundary disputes（边界纠纷）， TheU.S. launched the aggressive war to Mexico. After winning the war, the U.S. got all the territory in the north of Grande River.
Louisiana Purchase.
1810,The U.S occupied the western Florida where belongs to
Spain by force. 1818,The U.S invaded eastern Florida by army； 1819,The U.S bought eastren Florida in force by paying 5 million. 1846,The U.S forced Britan give up the Oregon in northwest area.
Territorial Expansion of the U.S.
The continental United States stretches 4,500 km. from the Atlantic Ocean on the west. It borders Canada on the north
continent and Hawaii in the
central Pacific.
borders Canada on the north
Atlantic Ocean on the west
Pacific Ocean on the east
Gulf of Mexico
The plain from Mississippi to Rocky Mountains .This purchase doubled the area of the country and was the largest estate deal US history. 1803,The U.S payed 15,000,000 dollars for French to buyin the
1803
1819
1810
1846
1846-1848
1853
1846
1803
1846-1848 1819 1853
1810
and reaches south to Mexico
and the GuHale Waihona Puke Baiduf of Mexico.
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The United States lies in North America with two youngest states----Alaska
on the northwest tip of the