What was a major pull factor that brought immigrants to the untied states between 1830 and 1850

A major pull factor that brought immigrants to the United States between 1830 and 1850 was the possibility of greater economic opportunities and individual freedoms. Many immigrants were leaving from situations of religious and political persecution and a lack of economic opportunity at this time. Therefore, they saw a move to the United States as an opportunity to overcome this and build a new life. 

They moved simply because of their economical state .