Question

How did the size of the us changed from 1776 to 1870??

Answer 1

In 1776 the us comprised od 13 colonies.By 1870  U.S. had expanded beyond the Mississippi river to the states of Minnesota,Nebraska and Texas.Oklahoma was still a territory. The U.S had the states of California,Nevada and Oregon on the west coast.Territories were between the west coast states and the states beyond the Mississippi river.