About 154 BC, a major revolt was re-ignited in Numantia, which is known as the First Numantine War, and a long war of resistance was fought between the advancing forces of the Roman Republic and the Lusitani tribes of Hispania. The praetor Servius Sulpicius Galba and the proconsul Lucius Licinius Lucullus arrived in 151 BC and began the process of subduing the local population. In 150 BC, Galba betrayed the Lusitani leaders he had invited to peace talks and had them killed, ingloriously ending the first phase of the war.