Its population in 2010 was about half the number in 1930. Historically, it has been known as an Irish American neighborhood. The Irish were the first major group of Europeans to immigrate to Chicago in the 19th century and defended their territory here against later arrivals, both Europeans, and African Americans who came north in the Great Migration. Its gangs were active in attacks on African Americans in the 1919 Race Riot. Since the late 20th century, Mexican immigrants and their descendants have also moved into the area.