What describes the period following the War of 1812?

a period of agricultural expansion and manufacturing slowdown

a period of foreign alliances and naval growth

an era of nationalism and economic growth

a time of political turmoil and Native American unrest

The correct answer is An era of nationalism and economic growth

After the war of 1812 Americans felt proud of their country and a strong sense of belonging. Also during the war, the British government cut America's access to manufactured goods and this forced America to somehow gain strength and produce those products internally what made the country gain economic independence.