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What is expansionism in history?

Expansionism—the desire of nations and empires to annex lands, peoples, or resources belonging to others—is a peculiar characteristic of a world order where boundaries are subject to the ambitions of those with the power and will to challenge them. [...] From: Expansionism. in The Oxford Companion to United States History »

What was the westward expansion?

Loading... During the 19th Century, more than 1.6 million square kilometers (a million square miles) of land west of the Mississippi River was acquired by the United States federal government. This led to a widespread migration west, referred to as Westward Expansion.

What does expansion mean in math?

the act or process of expanding. the state or quality of being expanded. the amount or degree of expanding. The present article is an expansion of one he wrote last year. anything spread out; expanse. Mathematics. the development at length of an expression indicated in a contracted form, as a 2 + 2 ab + b 2 for the expression ( a + b ) 2 .

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