How did the United States change after the war of 1812?

With the end of the War of 1812, the Native Americans could no longer count on Great Britain to shield them from the flood of white settlers headed west. ... In the years after the War of 1812, new states north and south entered the Union. At the same time, America's economic engine was fueled by King Cotton.

Explanation: hope i helped :D

Well the history is quite complex but here it is.

Explanation:

With the end of the War of 1812, the Native Americans could no longer count on Great Britain to shield them from the flood of white settlers headed west. ... In the years after the War of 1812, new states north and south entered the Union. At the same time, America's economic engine was fueled by King Cotton.

this question makes no sense dude

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate