 Flaccus returned to Rome with his veterans and Gracchus went to Celtiberia.In his account of this war, Appian wrote that the rebellion was by the tribes which lived along the River Iberus (the Greek name for the Ebro), including the Lusones (a small Celtiberian tribe in the north of Celtiberia, in the high Tajuña River valley, northeast of Guadalajara).He held that the rebellion was caused by the tribes having insufficient land.