why did the westward expansion begin? what were the reasons of moving to the west? why did Jefferson buy the Louisiana territory ? what roles did Spain and France have at that time ?

Americans thought it was their god given right to expand Westward and take over all of America. They also needed the land as it was good for farming and agriculture. There was also a population boom as more people were born and more people moved to the United States.

Explanation:

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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