New York City played a complex role in the American Civil War. The city's strong commercial ties to the southern United States existed for many reasons, including the industrial power of the Hudson River, which allowed trade with stops such as the West Point Foundry, one of the great manufacturing operations in the early United States; and the city's Atlantic Ocean ports, rendering New York City the American powerhouse in terms of industrial trade between the northern and southern United States. New York's growing immigrant population, which had originated largely from Germany and Ireland, began in the late 1850s to include waves of Italians and Central and Eastern European Jews flowing in en masse. Anger arose about conscription, with resentment at those who could afford to pay $300 to avoid service leading to resentment against Lincoln's war policies and fomenting paranoia about free Blacks taking the poor immigrants' jobs, culminating in the three-day-long New York Draft Riots of July 1863. These intense war-time riots are counted among the worst incidents of civil disorder in American history, with an estimated 119 participants and passersby massacred.