Runaway Journeys Overview Many Reasons to Leave > Maroon Communities and Major Slave Revolts: 17th-19th CentruriesThe Underground Railroad: 18th centuryThe Underground Railroad: 19th CenturyNetwork of routes through Greene, Warren and Clinton counties, Ohio Maroon Communities and Major Slave Revolts: 17th-19th CentruriesThe Underground Railroad: 18th centuryThe Underground Railroad: 19th CenturyNetwork of routes through Greene, Warren and Clinton counties, Ohio