Lucullus was sent to Hispania Citerior (Nearer Spain, on the east coast of Hispania) when the senate rejected a proposal for a peace treaty with the Celtiberians by Marcus Claudius Marcellus to end the Numantine War (154–152 BC). However, Marcellus went ahead with his plan and quickly concluded a treaty before Lucullus got there. Lucullus was disappointed and, "being greedy of fame and needing money because he was in straitened circumstances", he attacked the Vaccaei (a Celtiberian tribe which lived further north) who were not at war with Rome and did so without the authorisation of the senate. He claimed that they had mistreated the Carpetani as an excuse.