 In addition, Gracchus founded the colony (settlement) of Gracchurris (Alfaro, in La Rioja, northern Hispania) in the Upper Ebro Valley; and Iliturgi, a mining town and a frontier outpost in Hispania Ulterior.Gracchus' administrative arrangements and treaties ensured peace in the conquered territory for the next quarter of a century.Apart from a few minor episodes, Hispania remained quiet until the outbreak of the Lusitanian War (155–150 BC) and the Second Celtiberian War (154–151 BC).