Why were Irish used for difficult labor in the south?

Irish immigrants were often used for difficult labor in the South during the 19th century due to their status as a marginalized group, which made them more vulnerable to exploitation. Many Irish faced discrimination and limited job opportunities in other sectors, leading them to accept grueling work, such as in railroads and agriculture. Additionally, the Irish were seen as a cheaper labor source compared to enslaved African Americans, particularly after the Civil War, which further facilitated their employment in demanding roles. Their willingness to endure harsh conditions made them a convenient choice for labor-intensive projects.