Racial tension in Omaha, Nebraska  Racial tension in Omaha, Nebraska, occurred mostly because of the city's volatile mixture of high numbers of new immigrants from southern and eastern Europe and African-American migrants from the Deep South. While racial discrimination existed at several levels, the violent outbreaks were within working classes. Irish Americans, the largest and earliest immigrant group in the 19th century, established the first neighborhoods in South Omaha. All were attracted by new industrial jobs and most were from rural areas. There was competition among ethnic Irish, newer European immigrants, and African-American migrants from the South, for industrial jobs and housing. They all had difficulty adjusting to industrial demands, which were unmitigated by organized labor in the early years. Some of the early labor organizing resulted in increasing tensions between groups, as later arrivals to the city were used as strikebreakers. In Omaha as in other major cities, racial tension has erupted at times of social and economic strife, often taking the form of mob violence as different groups tried to assert power. Much of the early violence came out of labor struggles in early 20th century industries: between working class ethnic whites and immigrants, and blacks of the Great Migration. Meatpacking companies had used the latter for strikebreakers in 1917 as workers were trying to organize. As veterans returned from World War I, both groups competed for jobs. By the late 1930s, however, interracial teams worked together to organize the meatpacking industry under the United Packinghouse Workers of America (UPWA). Unlike the AFL and some other industrial unions in the CIO, UPWA was progressive. It used its power to help end segregation in restaurants and stores in Omaha, and supported the civil rights movement in the 1960s. Women labor organizers such as Tillie Olsen and Rowena Moore were active in the meatpacking industry in the 1930s and 1940s, respectively. Most violence and civil unrest in the 1960s, by contrast, arose out of poverty and problems caused by massive loss of working-class jobs through industrial restructuring. The city's African-American community suffered particularly and erupted in protest. The Nebraska Territory was created in 1854 with the condition that the area stay slave-free. But, from 1855 on, there was debate in the Territorial Legislature about whether slavery should specifically be prohibited. As there were few slaves in the state, some legislators did not think the bill was needed. In 1859, the "Daily Nebraskian" newspaper reported its favoring of slavery, writing,  During that period, some local newspapers openly editorialized against the presence of blacks in Omaha, for the Confederacy and against the election of Abraham Lincoln.