1840S
1840s
The 1840s decade ran from January 1, 1840, to December 31, 1849. A wave of revolutions in Europe. Collectively known as the Revolution of 1848. This led to mass immigration of these refugees into industrial cities of the United States as well as to other locations around the world.The above text is a snippet from Wikipedia: 1840s
and as such is available under the Creative Commons Attribution/Share-Alike License.