 Complete the following phrase:  The Astures entered the historical record in the late 3rd century BC, being listed amongst the Iberian Peninsula mercenaries of Hasdrubal Barcas army at the battle of Metaurus River in 207 BC. Silius also mentions an Astur mercenary contingent in Hannibals army, led by a chieftain named Cydnus. After the 2nd Punic War, their history is less clear. Rarely mentioned in the sources regarding the Lusitanian, Celtiberian or Roman Civil Wars of the 2nd and 1st centuries BC, they re-emerged from a relative obscurity just prior to the outbreak of the first 