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In 1776, the United States was comprised of the 13 colonies. By 1870, the U.S. had expanded beyond the Mississippi River to the states of Minnesota, Nebraska, Kansas, 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. Visit the Related Link for a map of how the US's size changed from 1776 to 1870.
North America comprises 4.8% of the earth's surface
The incorporation of the Republic of Texas into the United States of America in 1845 was called the Texas Annexation and became America's 28th state. During this period, Texas had a territory fifty percent larger than its size today. It included parts of the present states of New Mexico, Kansas, Oklahoma, Wyoming, and Colorado.
The common shoe size is a size 9.
it doubled the united states' size