What is a description of the old wave of immigrants of 1815 and the 1840s?

The old wave of immigrants during the period from 1815 to the 1840s primarily consisted of Europeans, particularly from countries like Ireland, Germany, and Britain. Many were fleeing economic hardship, political unrest, and famine, such as the Irish Potato Famine that began in the late 1840s. This wave contributed to the growth of urban centers in the United States, as immigrants settled in cities seeking jobs in burgeoning industries. Their arrival significantly shaped American culture, Demographics, and labor movements during this era.