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The United States believed in Manifest Destiny, which is the term used to describe how the country was destined to stretch from "sea to shining sea", or the Atlantic to Pacific. The US gained western territory by purchasing it (like the Louisiana Purchase), gaining it after war (like the Mexican Cession), or by creating an agreement with a country (like they did with Britain, thus gaining the Oregon Territory).

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11y ago
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12y ago

It was because the 49th and 50th state came along

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15y ago

They Travel west, with their horses and their feet along with wagons

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13y ago

explain how the roads, canals and railroads knitted during the westward expansion

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13y ago

the US tripled its size

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Q: How did the US expand its borders?
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