There were two of them: the first was the Texas Revolution (1835-1836) and the other one was the Mexican-American War (1846-1848).
The first one had to do with the ban of slavery in Mexico, which wasn't followed by American immigrants in Texas. This prompted a successful revolution by Texian settlers. The second had to do with American ambitions in the west, specifically, to get California at all costs.
in 1830s and 1840s
The 1830s and 1840s was a time a struggle for Italian nationalism. The nationalist had a goal of uniting the country against socialism.
Migration began to increase.
The Age of Jackson.
This is a Photographic system in use durring the 1830s and 1840s
Daniel Webster
The reform activism are some of the things that influenced the American culture during the 1830s and 1840s.
Northern Woman
1830s to 1840s
Railroads started in America at this time.
nativists
The time line is from the 1830s to around 1840s but this is approximate.