sentences:  The outlaw gangs also continued to be active in Lee and Winnebago counties following the events in Oregon.The "Prairie Bandits" were active across northern Illinois, especially in Lee, Ogle, Winnebago, and DeKalb counties, from 1835 until the events leading to their ultimate demise began on March 21, 1841.The Bandits wielded considerable influence in the area collectively known as the Rock River Valley, following the influx of immigrants after the Black Hawk War of 1832, the last Indian war in Illinois.